Solve the following equations: a) tan (x-72) = -1 on the interval (-∞,∞). b) 2cos (x/3) + 1 = 0 on the interval [0,27). c)

Question

Solve the following equations:
a) tan (x-72) = -1 on the interval (-∞,∞).
b) 2cos (x/3) + 1 = 0 on the interval [0,27).
c) 2cos^2(x) -3cos(x) +1 = 0 on the interval
[0,2π)

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