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Q25: Question – Paper 1 – June 2018
Q25: Question – Paper 1 – June 2018
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25)
Here is a sketch of the graph of y = cos x for values of x from 0° to 360°
25)
Here is a sketch of the graph of y = cos x for values of x from 0° to 360°
25 a) cos x = cos 60°
Work out the value of x when 90° ⩽ x ⩽ 360°
Work out the value of x when 90° ⩽ x ⩽ 360°
[1 mark]
25 b) cos x = – cos 60°
Work out the value of x when 180° ⩽ x ⩽ 360°
[1 mark]