Mathematics 9709 · AS & A Level · Trigonometry

Trigonometry — practice question

(a)[3]

Solve the equation $|2x-3|=|5x+2|$.

(b)[3]

Hence solve the equation $|2\sec\theta-3|=|5\sec\theta+2|$ for $\pi<\theta<2\pi$. Give your answer correct to 3 significant figures.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Solving $2x-3=5x+2$ gives $-\frac{5}{3}$” …