Question

Find the exact value of each by using a sum/difference formula. 7) $\sin\left(-\frac{5\pi}{12}\right)$ 8) $\cos\left(\frac{13\pi}{12}\right)$

          Find the exact value of each by using a sum/difference formula.
7) $\sin\left(-\frac{5\pi}{12}\right)$
8) $\cos\left(\frac{13\pi}{12}\right)$

Find the exact value of each by using a sum/difference formula.
7) sin(-(5π)/(12))
8) cos((13π)/(12))

Added by Elizabeth A.

Introductory and Intermediate Algebra for College Students 4th

Robert Blitzer 4th Edition

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Solved by Expert Yujie Wang

Step 1

So we have: sin(5r + 7) = sin(5r)cos(7) + cos(5r)sin(7) Show more…

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Find the exact value of each by using a sum/difference formula. 5r 7) sin 12 13T 8 cos 12

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Find the exact value of each by using a sum/difference formula. 7) $\sin\left(-\frac{5\pi}{12}\right)$ 8) $\cos\left(\frac{13\pi}{12}\right)$

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