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These are the Transum resources related to the statement: "The Pythagorean identity cos^{2}θ+sin^{2}θ=1. Double angle identities for sine and cosine. The relationship between trigonometric ratios".

Here are some exam-style questions on this statement:

- "
*In triangle ABC, the length of AB = 5cm, AC = 13cm and \( \cos B \hat AC = \frac18 \).*" ... more - "
*Consider a right-angled triangle, ABC, with the right angle at vertex C and where \(\sin A = \frac{12}{13}\)*" ... more - "
*The cosine of acute angle \( \alpha \) is \( \frac{1}{ \sqrt 5} \)*" ... more

Click on a topic below for suggested lesson starters, resources and activities from Transum.

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