Trig Fns - 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
Solve for the exact value of $\cos\left(\frac{x}{2}\right)$cos(x2) if $\cos x=\frac{2}{5}$cosx=25 and $0
Easy
5min
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