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I need help with this question please. 6.[8] Find all solutions in the interval [0,27) of the trigonometric equation: (i) 4 sin2 x = 3

I need help with this question please.

6.[8] Find all solutions in the interval [0,27) of the trigonometric equation: (i) 4 sin2 x = 3 (ii) 2sin2 x + cosx - 1 = 0

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