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6.04 Double and half angle identities

Interactive practice questions

Given $\cos\theta=\frac{4}{5}$cosθ=45 and $\sin\theta=\frac{3}{5}$sinθ=35:

a

Find the value of $\sin2\theta$sin2θ.

b

Find the value of $\cos2\theta$cos2θ.

c

Find the value of $\tan2\theta$tan2θ.

Easy
9min

Given $\cos\theta=\frac{4}{5}$cosθ=45 and $\sin\theta$sinθ$<$<$0$0, find:

Easy
9min

Given $\sin\theta=-\frac{7}{25}$sinθ=725 and $\cos\theta$cosθ$<$<$0$0, find:

Easy
9min

Given $\tan\theta=\frac{5}{12}$tanθ=512 and $\cos\theta$cosθ$<$<$0$0, find:

Easy
9min
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