Β 
VIEW IN FULL SCREEN

AQA A-level Maths Trigonometric Identities

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

Trig identity and it’s applications (1)

Trig identity and it’s applications (2)

We can use both Pythagorean identities to solve algebra and geometry problems.

Applications of trigonometric identities

1

Find the value of tanx, given that cosx = βˆ’0.7 and x is in the 2nd quadrant. Give your answer correct to two decimal places.

Find the value of tanx, given that cosx = βˆ’0.7 and x is in the 2nd quadrant. Give your answer correct to two decimal places.

2

Solve 2sinx = cosx for 0 < x < 90 correct to 1 decimal place.

Solve 2sinx = cosx for 0 < x < 90 correct to 1 decimal place.

3

Simplify cosΒ²(x) + cosΒ²(x)tanΒ²(x).

Simplify cosΒ²(x) + cosΒ²(x)tanΒ²(x).

4

Prove 2sinΒ²(x) βˆ’ 2 = βˆ’2cosΒ²(x).

Prove 2sinΒ²(x) βˆ’ 2 = βˆ’2cosΒ²(x).

5

Simplify the equation shown.

Simplify the equation shown.

End of page

Β