Find the maximum and minimum value …
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Posted by Vaibhav Kulkarni 4 years, 11 months ago
- 1 answers
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Gaurav Seth 4 years, 11 months ago
2cos2x-cos4x
=2 cos2x -2cos22x +1
=-2(cos2x-1/2)2 +3/2
minimum value occur when cos2x-1/2 will be maximum
=-2(-1-1/2)2 +3/2
=-3
and minimum value is 3/2
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