AQA A-level Maths Trigonometric Identities

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Prove 2sinΒ²(x) βˆ’ 2 = βˆ’2cosΒ²(x).

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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.

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What is cosx/sinx equal to?

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cosx = 1/3 and tanx = 2/5, what does sinx equal?

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Solve 2sinx = cosx for 0 < x < 90.

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

Simplify the equation shown.

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

Simplify cosx + sinxtanx.

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

Simplify (cosx/sinx)((1 βˆ’ cosΒ²x)/(1 βˆ’ sinΒ²x)).

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