(a)[2]
Using the diagram, sketch the graph of $y = \cos x$ for $0^{\circ} \le x \le 360^{\circ}$.
(b)[2]
Solve $\cos x = -\frac{1}{2}$ for $0^{\circ} \le x \le 360^{\circ}$.
Mathematics 0580 · IGCSE · Trigonometric functions
Trigonometric functions — practice question
A pair of axes is displayed, with the $x$-axis extending from $0^{\circ}$ to $360^{\circ}$ and the $y$-values spanning from $-1$ to $1$.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The graph passes correctly through $(0,1),(180,-1),(360,1)$.” …
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