(main)[5]
Solve the equation $\cos(\theta + 60^{\circ}) = 2\sin\theta$, and list every solution in the interval $0^{\circ} \leq \theta \leq 360^{\circ}.$
Mathematics 9709 · AS & A Level · Trigonometry
Trigonometry — practice question
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Makes an attempt to use the $\cos(A+B)$ identity to form an equation in $\cos\theta$ and $\sin\theta$” …
- Full mark scheme, point by point
- Step-by-step worked solution
- Write your answer & get it marked instantly by AI