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QLDMath MethodsQuick questions

Unit 4: Further calculus and statistical inference

Quick questions on Integration of trigonometric functions: QCE Maths Methods Unit 4

2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is wrong sign on cos\cos antiderivative?
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sinx=cosx\int \sin x = -\cos x (sign change); cosx=+sinx\int \cos x = +\sin x (no sign change).
What is sign-cancellation forgotten when integrand changes sign on the interval?
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For total area, split at zeros and take absolute values; for signed integral, do not.

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