Mathematics

Mathematics

Problem

(i) Express cos⁡5θ−cos⁡θ\cos5\theta-\cos\theta as a product of two trigonometric factors. (ii) Using the result of part (i), solve the equation cos⁡5θ−cos⁡θ=0\cos5\theta-\cos\theta=0 for 0<θ<2π0<\theta<2\pi.

Browse the problem library