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  • 13-11-2022
  • Mathematics
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Here is a sketch of the graph of y = cos x for values of x from 0° to 360°
AS
90 180° 270° 360 X
O
a) cos x = cos 60°
Work out the value of x when 90° < x < 360°
b) cos x = cos 60°
Work out the value of x when 180° < x < 360°

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