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Solve the following equations: a) tan (x - )= -1 on the interval (-00, 00). b) 2cos w + 1 = 0 on the interval

Solve the following equations: a) tan (x - ")= -1 on the interval (-00, 00). b) 2cos w + 1 = 0 on the interval [0,21 ). c) 2cos2(x) - 3cos(x) + 1 =0 on the interval [0,21)

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