AQA A-level Maths Trigonometric Identities
This page covers the following topics:
1. Trig identity and it’s applications (1)
2. Trig identity and it’s applications (2)
3. Applications of trigonometric identities
We can use both Pythagorean identities to solve algebra and geometry problems.
Find the value of tanx, given that cosx = −0.7 and x is in the 2nd quadrant. Give your answer correct to two decimal places.
Solve 2sinx = cosx for 0 < x < 90 correct to 1 decimal place.
Simplify cos²(x) + cos²(x)tan²(x).
Prove 2sin²(x) − 2 = −2cos²(x).
Simplify the equation shown.
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