Trig Fns - Identities
Interactive practice questions
Expand $\tan\left(\theta-x\right)$tan(θ−x).
Easy
1min
Expand $\sin\left(3x-y\right)$sin(3x−y), rewriting it in terms of angles $3x$3x and $y$y.
Easy
1min
Expand $\cos\left(2x+3y\right)$cos(2x+3y), rewriting it in terms of angles $2x$2x and $3y$3y.
Easy
< 1min
Express $\sin A\cos2B+\cos A\sin2B$sinAcos2B+cosAsin2B using one trigonometric ratio.
Easy
< 1min
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