C2 Trigonometr y: Trigonometric Equations PhysicsAndMathsTutor
5sin 2x = 2cos 2x, giving your answers to 1 decimal place. (5) (Total 6 marks) 2. (a) Show that the equation . 5 sin x = 1 + 2 cos2 x. can be written in the form . 2 sin2 x + 5 sin x – 3 = 0 (2) (b) Solve, for 0 . ≤x < 360°, 2 sin2 x + 5 sin x – 3 = 0 (4) (Total 6 marks) 3. (i) Solve, for –180° ≤ θ < 180°, (1 + tan θ)(5 sin θ ... ................
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