(a)[2]
Using the diagram, sketch the graph of $y = \cos x$ for $0^\circ \leq x \leq 360^\circ$.
(b)[3]
Solve $4\cos x + 2 = 3$ for $0^\circ \leq x \leq 360^\circ$.
Mathematics 0580 · IGCSE · Trigonometric functions
Trigonometric functions — practice question
The diagram has axes labelled with $0^\circ, 90^\circ, 180^\circ, 270^\circ$ and $360^\circ$ on the x-axis.