Edexcel Mathematics Sample paper · Paper 2 · Question 12 · ExamRizz

ExamRizzEdexcel MathematicsMathematics

Sample paper · Paper 2 · Question 12 · 8 marks

12. (a) Solve, for –180° x < 180°, the equation 3 sin2 x + sin x + 8 = 9 cos2 x giving your answers to 2 decimal places. (6) (b) Hence find the smallest positive solution of the equation 3sin2 (2θ – 30°) + sin (2θ – 30°) + 8 = 9 cos2 (2θ – 30°) giving your answer to 2 decimal places.

Lesson: Definitions of Sine, Cosine and Tangent and Exact Values