0606/21/M/J/16 Q9

Question

9 (a) Given that y = a tan bx + c has period 𝝅/4 radians and passes through the points (0, -2) and ( 𝝅/16, 0), find the value of each of the constants a, b and c.

(b) (i) On the axes below, draw the graph of y = 2cos3x + 1 for -2 𝝅/3 < x <2 𝝅/3 radians.

(ii) Using your graph, or otherwise, find the exact solutions of (2cos3x + 1)^2 = 1 for -2 𝝅/3 < x <2 𝝅/3 radians.

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    2021-03-28T12:40:37+08:00

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