Mathematics

Mathematics

Problem

Let f(θ)=sin⁡θ(sin⁡θ+sin⁡3θ)f(\theta) = \sin \theta (\sin \theta + \sin 3\theta). Sketch the graph of f(θ)f(\theta). a. ≥0\ge 0 , only when θ≥0\theta \ge 0 b. ≤0\le 0 , for all real θ\theta c. ≥0\ge 0 , for all real θ\theta d. ≤0\le 0 , only when θ≤0\theta \le 0

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