(a)[2]
From the diagram, sketch the graph of $y = \cos x$ for $0^\circ \leq x \leq 360^\circ$.
(b)[3]
Solve the equation $5\cos x + 3 = 0$ for $0^\circ \leq x \leq 360^\circ$.
Mathematics 0580 · IGCSE · Trigonometric functions
Mathematics 0580 · IGCSE · Trigonometric functions
From the diagram, sketch the graph of $y = \cos x$ for $0^\circ \leq x \leq 360^\circ$.
Solve the equation $5\cos x + 3 = 0$ for $0^\circ \leq x \leq 360^\circ$.