Question 7 - A-Level Maths

Sketch the graph of \(y = \sec x\) for \(0 \leqslant x \leqslant 2 \pi\).
Solve the equation \(\sec x = 3\) for \(0 \leqslant x \leqslant 2 \pi\), giving the roots correct to 3 significant figures.
Solve the equation \(\sec \theta = 5 \operatorname { cosec } \theta\) for \(0 \leqslant \theta \leqslant 2 \pi\), giving the roots correct to 3 significant figures.