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(a) Express 3 sin x + 2 cos x in the form R sin (x + α) where R > 0 and 0 < α < . (4) (b) Hence find the greatest value of (3 sin x + 2 cos x)4. (2) (c) Solve, for 0 < x < 2π, the equation 3 sin x + 2 cos x = 1, giving your answers to 3 decimal places. (5) June 2007. 7. (a) Express 4 cosec2 2θ − cosec2 θ in terms of sin θ and cos θ. (2 ... ................
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