C2 Trigonometry: Trigonometric Identities PhysicsAndMathsTutor
(a) 2 sin θ = 3 cos θ, (3) (b) 2 – cos θ = 2 sin2 θ. (6) (Total 9 marks) 2. Solve, for –90° < x < 90°, giving answers to 1 decimal place, (a) tan (3x + 20°) = 2 3, (6) (b) 2 sin2 x + cos2 x = 9 10. (4) (Total 10 marks) 3. Solve, for 0 ≤ θ < 2π, the equation . sin2 θ = 1 + cos θ , giving your answers in terms of π. (Total 5 ... ................
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