SOLUTION: what is the minimum value of y= -5+2cos4x?

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Question 669906: what is the minimum value of y= -5+2cos4x?
Answer by solver91311(24713) About Me  (Show Source):
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The cosine of anything varies between 1 and -1, so 2 times the cosine of anything varies between 2 and -2, so the smallest value that 2cos4x can assume is -2. -2 plus -5 is

John

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