Let . The graph of shows that…

MATHEMATICS · Single correct · CBSE · Mathematics · Trigonometric Functions · Trigonometric Functions

Problem

Let f(θ)=sin⁡θ(sin⁡θ+sin⁡3θ)f(\theta)=\sin\theta(\sin\theta+\sin3\theta). The graph of f(θ)f(\theta) shows that f(θ)f(\theta) is (1) ≥0\geq0, only when θ≥0\theta\geq0 (2) ≤0\leq0, for all real θ\theta (3) ≥0\geq0, for all real θ\theta (4) ≤0\leq0, only when θ≤0\theta\leq0

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