IGCSE Mathematics 0580/04/SP/20 Q8

Question

8   The grid shows the graph of y = cosx for 0° ⩽ x ⩽ 360°.

 

 (a) Solve the equation 3cos x = 1 for 0° ⩽ x ⩽ 360°. Give your answers correct to 1 decimal place.

 

(b) On the same grid, sketch the graph of y = sinx for 0° ⩽ x ⩽ 360°.

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