Question
$$\text { Evaluate exactly: } \sin \left[\cos ^{-1}\left(\frac{\sqrt{2}}{2}\right)+\sin ^{-1}\left(-\frac{1}{2}\right)\right]$$.
Step 1
We can use the formula for $\sin(a+b)$ which is $\sin a \cos b + \cos a \sin b$. Show more…
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