Q: The number of critical points of f (x) = max ( sin x , cos x) for x ∈ (0 , 2 π)

(A) 2

(B) 5

(C) 3

(D) none of these

Sol: Clearly A, B and C are the critical points.

Hence (C) is correct.

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# The number of critical points of f (x) = max ( sin x , cos x) for x ∈ (0 , 2 π)

Q: The number of critical points of f (x) = max ( sin x , cos x) for x ∈ (0 , 2 π)

(A) 2

(B) 5

(C) 3

(D) none of these

Sol: Clearly A, B and C are the critical points.

Hence (C) is correct.