find the maximum and minimum value of cos square x
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Min-Max table
Min value Max value
cos θ, cos 4θ , cos 7θ … cos nθ -1 +1
sin2 θ , sin2 4θ , sin2 9θ …sin2 nθ 0 +1
cos2 θ , cos2 3θ , cos2 8θ … cos2 nθ
Sin θ Cos θ -1/2 +1/2
som99:
find the maximum and minimum value of cos square x - sin square x
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