(b) Find the following. Use exact values and not decimal approximations.\\ $\cos\left(-\frac{5\pi}{6}\right) = $\\ $\cos\left(-\frac{5\pi}{6} + 4\pi\right) = $
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Therefore, $$cos\left(-\frac{5\pi}{6} + 4\pi\right) = cos\left(-\frac{5\pi}{6}\right)$$ Show more…
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