Question: Help, please Write the expression in terms of first powers of cosine. sint r Select one: O a. cos 4x + cos 2x + 00

Help, please

Write the expression in terms of first powers of cosine. sint r Select one: O a. cos 4x + cos 2x + 00 | 09 O b. cos 4x + cos 2x + 3 C0 | # 00 H O0 H O0 | H O C. cos 4x - cos 2x + 3 O d. cos 41 - cos 2x +
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