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(Solved): Use the power reducing formulas to rewrite \( \cos ^{4} 5 x \) in terms of the first power of cosin ...
Use the power reducing formulas to rewrite \( \cos ^{4} 5 x \) in terms of the first power of cosine. Simplify your answer as much as possible. To indicate your answer, first choose one of the four forms below. Then fill in the blanks with the appropriate numbers.
Expert Answer
Using the rule: cos2x=1+cos?2x2 Now,