Mathematics 9709 · AS & A Level · Trigonometry

Trigonometry — practice question

(main)[4]

Solve for $x$ in the equation $15\sin^2 x = 13 + \cos x$ over $0^{\circ} \leq x \leq 180^{\circ}$.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Rearrange to $15\cos^2 x + \cos x - 2 = 0$” …

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI