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Let f(x) = cos^2x + cos^22x + cos^23x. Number of values of x ∈[0,p] for which f(x) equals the smallest positive integer is

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in Mathematics by kratos

Let f(x) = cos2x + cos22x + cos23x. Number of values of x ∈[0,p] for which f(x) equals the smallest positive integer is

(A) 3 (B) 4 (C) 5 (D) 6

1 Answer

+1 vote
by kratos
 
Best answer

Correct option (C) 5

Explanation:

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