Question: Problems 6978. The purpose of these problems is to keep the material fresh in your mind so that you are better prepared for later sections,

Problems 69–78. The purpose of these problems is to keep the material fresh in your mind so that you are better prepared for later sections, a final exam, or subsequent courses such as calculus. If cos a (a) cos 2 3,0 < a < , find

If cos a (a) cos 2 3,0 < a < , find the exact value of: a 2 (b) sin- 8|2 (c) tan-

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