Question
Given $\sin (a)=\frac{4}{5}$ and $\cos (b)=\frac{1}{3},$ with $a$ and $b$ both in the interval $\left[0, \frac{\pi}{2}\right):$a. Find $\sin (a-b)$b. Find $\cos (a+b)$
Step 1
We can find $\cos (a)$ and $\sin (b)$ using the Pythagorean identity. Show more…
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