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in Sets, relations and functions by (53.3k points)

Let f(θ) = sinθ (sinθ + sin3θ ), then

(A) f(θ)q ≥ 0 only when ≥ 

(B)  (θ) q ≤ 0 for all real θ

(C) f(θ) ≥ 0 for all real θ

(D)  f(θ )≤ 0 only when θ ≤ 0

1 Answer

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by (53.4k points)
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Best answer

Correct option (C) f(θ) ≥ 0 for all real θ

Explanation :

f(θ)= + sinθ(sinθ + sin3θ

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