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Can somebody please help me with this question. Find the minimum value of cosx.cos(60-x).cos(60+x)

Can somebody please help me with this question.
Find the minimum value of cosx.cos(60-x).cos(60+x)
 

Grade:11

1 Answers

Anish Singhal
askIITians Faculty 1192 Points
5 years ago
The given expression is equal to ¼ cos3x hence its minimum value will be -1/4

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