2(cos3x+3cosx) solve this problem
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Answer:
Step-by-step explanation:
2(4cos^3x-3cosx+3cosx)
=8cos^3x
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2(cos3x+3cosx)
2(4cos³x-3cosx + 3cosx)
2(4cos³x)
8cos³x
2(4cos³x-3cosx + 3cosx)
2(4cos³x)
8cos³x
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