??? - 2013 JUNE Q4 Answers
4.
(i) Starting with an equilateral triangle, prove that cos 30° = √3/2. [2]
(ii) Solve the equation 2 sin θ = -1 for 0≤ θ≤ 2π, giving your answers in terms of π. [3]
(i) Starting with an equilateral triangle, prove that cos 30° = √3/2. [2]
(ii) Solve the equation 2 sin θ = -1 for 0≤ θ≤ 2π, giving your answers in terms of π. [3]
Answers
