Solve the equation 5 , 2 - 5 , 2 =0 for .

MATHEMATICS · Multi-part · CBSE · Mathematics · Trigonometric Functions · Trigonometric Functions

Problem

Solve the equation sin⁡5θ cos⁡2θ−cos⁡5θ sin⁡2θ=0\sin5\theta\,\cos2\theta-\cos5\theta\,\sin2\theta=0 for 0≤θ<2π0\le\theta<2\pi. (i) Express the left-hand side as a single trigonometric function of one angle. (ii) Hence find the general solution of the resulting equation. (iii) List all solutions that lie in the interval 0≤θ<2π0\le\theta<2\pi, arranging them in ascending order.

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