(i)[2]
Simplify $\sin 2\alpha \sec \alpha$.
(ii)[3]
Given that $3\cos 2\beta + 7\cos \beta = 0$, find the exact value of $\cos \beta$.
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: “State $\sin 2\alpha = 2\sin\alpha\cos\alpha$ and $\sec\alpha = 1/\cos\alpha$” …
- Full mark scheme, point by point
- Step-by-step worked solution
- Write your answer & get it marked instantly by AI