# Topic Questions: 4.3 The use of $\frac{dy}{dx}=\frac{1}{\left(\frac{dx}{dy}\right)}$ — WMA13 Differentiation > 27 WMA13 Differentiation topic questions (95 marks) on 4.3 The use of … — 16 papers, 2020–2026. Open the exact question in the original paper. - Canonical HTML: https://www.examsci.com/topics/edexcel-ial/mathematics/pure-mathematics-3-wma13/differentiation/4-3-the-use-of-frac-dy-dx-frac-1-left-frac-dx-dy-right/ - Markdown mirror: https://www.examsci.com/topics/edexcel-ial/mathematics/pure-mathematics-3-wma13/differentiation/4-3-the-use-of-frac-dy-dx-frac-1-left-frac-dx-dy-right/index.md --- Edexcel IAL · Mathematics · WMA13 · Differentiation 27 WMA13 Differentiation topic questions are tagged to this syllabus point across 16 papers (2020–2026). Only the parts whose knowledge graph matches this syllabus statement are counted, and the table shows which parts of each question are involved. - 27 topic questions - 16 papers - 95 tagged marks - 16.9% of topic questions - 19.5% of topic marks - 2020–2026 - Syllabus 2018–current - [All WMA13 Differentiation topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/pure-mathematics-3-wma13/differentiation/) - [All paper codes](https://www.examsci.com/topics/) Core finding **This Differentiation syllabus point appears in 16 WMA13 papers across 2020–2026, contributing 27 topic questions and 95 marks.** The most recent appearance is WMA13/01 January 2026. That equals 16.9% of the 160 topic questions and 19.5% of the 488 marks tagged to Differentiation. Only parts tagged to this subtopic are counted, so a four-part question can contribute one item and one part's marks. The table lists every matching question, its tagged parts and marks, with a link back to the paper page. Sessions are newest first, so the statement can be traced back through the full paper history. ## Topic questions by session Newest sessions first. Parts and marks count only the parts tagged to this subtopic; “x of y parts” shows how much of the question is tagged elsewhere. Select the paper cell to open the matching question on the paper page, or use **Go to Practice Hub** to answer that exact question in the Interactive Practice Hub. | Paper | Question | Type | Parts | Marks | Difficulty | Practice | | --- | --- | --- | --- | --- | --- | --- | | [**WMA13/01** January 2026 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2026-january-wma13-01/#q-8) | **Q8** Implicit Differentiation and Reciprocal Derivative - Edexcel IAL P3 Jan 2026 Q8 | FRQ | 1 part | 4 | Hard | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b91d109b-12f0-4102-aa8f-400fe2a86d4f&question_id=0cc25e81-4e3a-4d3c-af0c-e8f42737f579&source_detail=WMA13%2F01+January+2026) | | [**WMA13/02** January 2026 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2026-january-wma13-02/#q-4) | **Q4** Differentiation - Edexcel IAL P3 Jan 2026 Q4 | FRQ | 1 part | 4 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=416be4ac-52e5-488e-a9c0-0597b9ecb63b&question_id=9b217e39-7686-47a9-83c8-8642d44bbb27&source_detail=WMA13%2F02+January+2026) | | [**WMA13/01** June 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2025-june-wma13-01/#q-9) | **Q9** Trigonometry and differentiation - Edexcel IAL Pure Mathematics P3 June 2025 Q9 | FRQ | 2 of 3 parts ((b), (c)) | 8 of 11 on the paper | Hard | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b98f92bb-447a-4cfa-83c9-63fc1aac1791&question_id=3a23cbf4-79f3-494b-bc32-303135b64716&source_detail=WMA13%2F01+June+2025) | | [**WMA13/02** June 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2025-june-wma13-02/#q-3) | **Q3** Differentiation & Tangent Coordinates - Edexcel IAL P3 Summer 2025 Q3 | FRQ | 2 parts ((a), (b)) | 8 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=aed25413-38cc-42bd-b2b2-c8d703ca53e5&question_id=cd3253b0-84d1-458d-bd97-ba33efcd5d6c&source_detail=WMA13%2F02+June+2025) | | [**WMA13/01** January 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2025-january-wma13-01/#q-10) | **Q10** Implicit Differentiation and Gradients - Edexcel IAL P3 Jan 2025 Q10 | FRQ | 2 of 3 parts ((b), (c)) | 7 of 9 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ecf09460-9ef7-4eaa-b080-ca6aece93a99&question_id=40f2020f-647e-4f62-aa56-d562892ca922&source_detail=WMA13%2F01+January+2025) | | [**WMA13/01** October 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2024-october-wma13-01/#q-2) | **Q2** Reciprocal Derivatives and Coordinates - Edexcel IAL P3 Oct 2024 Q2 | FRQ | 2 parts ((a), (b)) | 5 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=d4feaf64-6c81-4e52-9be5-5c0526923f6f&question_id=d65b3de4-acb0-4695-a57c-4875fd54ac76&source_detail=WMA13%2F01+October+2024) | | [**WMA13/01** June 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2024-june-wma13-01/#q-9) | **Q9** Trigonometry and Coordinates - Edexcel IAL P3 June 2024 Q9 | FRQ | 2 of 3 parts ((b), (c)) | 9 of 10 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b9555bea-c6d3-4cbd-b1ab-b0397c8b6901&question_id=0887a399-debc-49ba-b9e2-0f61c019007c&source_detail=WMA13%2F01+June+2024) | | [**WMA13/01** October 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2023-october-wma13-01/#q-10) | **Q10** Implicit Differentiation and Reciprocal Rules - Edexcel P3 Oct 2023 Q10 | FRQ | 3 of 5 parts ((c), (d)(i), (d)(ii)) | 5 of 9 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=3ba04af0-df38-436f-8463-bcb730944c19&question_id=e7b5cc61-9703-4258-a069-3da48942ecd0&source_detail=WMA13%2F01+October+2023) | | [**WMA13/01** June 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2023-june-wma13-01/#q-10) | **Q10** Parametric Differentiation and Tangents - Edexcel IAL Pure Mathematics P3 June 2023 Q10 | FRQ | 2 parts ((a), (b)) | 8 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=df8c9a60-a7c2-40ba-aafe-b3d75fa2b513&question_id=fb3a932e-76bd-4761-8e9c-a973fac975d5&source_detail=WMA13%2F01+June+2023) | | [**WMA13/01** January 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2023-january-wma13-01/#q-7) | **Q7** Differentiation of Trigonometric Functions - Edexcel IAL Pure Mathematics P3 January 2023 Q7 | FRQ | 1 of 2 parts ((a)) | 4 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=9520c4fd-f54c-4973-8bd6-906cc4cdf380&question_id=e41dc8e5-2446-4b32-90fa-b7f9c5a4ca88&source_detail=WMA13%2F01+January+2023) | | [**WMA13/01** October 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2022-october-wma13-01/#q-4) | **Q4** Logarithms and Differentiation - Edexcel IAL Pure Mathematics P3 October 2022 Q4 | FRQ | 1 of 2 parts ((b)) | 3 of 5 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=09d7e936-6b00-4171-84bf-78b6821eee70&question_id=527e577e-bfcf-42c3-9dd3-fad7ee2bb918&source_detail=WMA13%2F01+October+2022) | | [**WMA13/01** January 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2022-january-wma13-01/#q-10) | **Q10** Implicit Differentiation and Stationary Points - Edexcel IAL P3 Jan 2022 Q10 | FRQ | 2 parts ((a), (b)) | 7 | Hard | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b815ce52-b63f-4883-92ce-747290f56811&question_id=8d7cb2f3-dadc-4a13-8d7d-2efc05306ec5&source_detail=WMA13%2F01+January+2022) | | [**WMA13/01** October 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2021-october-wma13-01/#q-8) | **Q8** Arcsine Differentiation and Tangent - Edexcel IAL P3 October 2021 Q8 | FRQ | 2 of 3 parts ((b), (c)) | 6 of 7 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=17b8ea5e-8edc-48d9-80ad-0d3d7d35e66a&question_id=4fc1d4c2-2b26-4e05-aa36-5ab3bfb9ad49&source_detail=WMA13%2F01+October+2021) | | [**WMA13/01** June 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2021-june-wma13-01/#q-7) | **Q7** Differentiation of Inverse Trigonometric Expressions - Edexcel IAL P3 2021 Jun Q7 | FRQ | 1 part | 5 | Hard | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b21212f-2ba5-4561-a1a9-89eea72d9095&question_id=1bb22fba-8684-4a11-b4b9-11b11ffbee09&source_detail=WMA13%2F01+June+2021) | | [**WMA13/01** January 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2021-january-wma13-01/#q-10) | **Q10** Differentiation of Inverse Trigonometric Curves - Edexcel IAL Pure Mathematics P3 Jan 2021 Q10 | FRQ | 2 of 3 parts ((b), (c)) | 8 of 10 on the paper | Hard | [Go to Practice Hub](https://www.examsci.com/practice?set_id=f92eac0f-28ee-4528-9654-d30258f13985&question_id=83d870b0-4426-4267-a794-484e0325ed49&source_detail=WMA13%2F01+January+2021) | | [**WMA13/01** October 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/pure-mathematics-3-wma13/2020-october-wma13-01/#q-8) | **Q8** Calculus and Trigonometric Functions - Edexcel IAL P3 June 2020 Q8 | FRQ | 1 of 3 parts ((ii)) | 4 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0df42054-dee9-4801-8b02-f55948e61436&question_id=9d9b7dc9-7a23-4790-aedd-597f752d9bab&source_detail=WMA13%2F01+October+2020) | ## Related topic questions in Differentiation - [4.1 Differentiation of $e^{kx},$ $\ln kx,$ $\sin kx,$ $\cos kx,$ $\tan kx$ and their sums and differences.](https://www.examsci.com/topics/edexcel-ial/mathematics/pure-mathematics-3-wma13/differentiation/4-1-differentiation-of-e-kx-ln-kx-sin-kx-cos-kx-tan-kx-and-their-sums-and-differences/) — 59 question items · 20 papers — 206 marks · 2020–2026 - [4.2 Differentiation using the product rule, the quotient rule and the chain rule.](https://www.examsci.com/topics/edexcel-ial/mathematics/pure-mathematics-3-wma13/differentiation/4-2-differentiation-using-the-product-rule-the-quotient-rule-and-the-chain-rule/) — 80 question items · 21 papers — 284 marks · 2020–2026 - [4.4 Understand and use exponential growth and decay.](https://www.examsci.com/topics/edexcel-ial/mathematics/pure-mathematics-3-wma13/differentiation/4-4-understand-and-use-exponential-growth-and-decay/) — 56 question items · 18 papers — 127 marks · 2020–2026 ## Topic question rules and edge cases **How many topic questions cover this syllabus point?** 16 question stems cover this subtopic across 16 papers, but only 27 tagged parts and 95 marks belong to it. Other parts of the same questions are assessed under different statements and are excluded from this page. **Which papers include this subtopic?** The table lists every matching session from 2020–2026. Each row links to the question anchor on the paper page, where the full paper context and practice entry point are available. **Why can one question appear under several subtopics?** The parts of one question can assess different syllabus statements. Each part is counted under its own subtopics, so the same question stem can appear on several subtopic pages while each page lists only the parts and marks tagged to that statement. **Can I practise these questions with AI marking?** Yes. Open a paper from the table and use the Interactive Practice Hub entry point. The page itself is static HTML so search engines and retrieval agents can read the full question list without executing JavaScript. --- Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/topics/edexcel-ial/mathematics/pure-mathematics-3-wma13/differentiation/4-3-the-use-of-frac-dy-dx-frac-1-left-frac-dx-dy-right/