(a)[2]
Sketch the curve for $y = \cos x$ over $0^{\circ} \le x \le 360^{\circ}$.
(b)[2]
Determine the reflex angle $x$.
Mathematics 0580 · IGCSE · Trigonometric functions
Trigonometric functions — practice question
The diagram shows axes with $0^{\circ}$ to $360^{\circ}$ on the $x$-axis and values from $-1$ to $1$ on the $y$-axis.