4.a.2 - 2015 Q8
(i) Solve, for -π ≤ θ < π, the equation
giving your answers in terms of π. (3)
(ii) Given that
(ii) Given that
(a) find cos x in terms of k. (3)
(b) When k = 3, find the values of x in the range 0 < θ ≤ 360° (3)
(b) When k = 3, find the values of x in the range 0 < θ ≤ 360° (3)