(a)[2]
Sketch the graph of $y = \cos x$ over $0^\circ \le x \le 360^\circ$.
(b)[2]
Solve the equation $\cos x = 0.294$ within $0^\circ \le x \le 360^\circ$.
Mathematics 0580 · IGCSE · Trigonometric functions
Trigonometric functions — practice question
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Accurate cosine graph passing through $(0,1)$, $(360,1)$ and lying near $(180,-1)$” …
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