SOLUTION: cos(4θ)=0

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Question 1116153: cos(4θ)=0
Answer by ikleyn(53763) (Show Source):
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cos(4t) = 0 =====> 4t = , where k is any integer k = 0, +/-1, +/-2, . . . ====> t = , where k is any integer k = 0, +/-1, +/-2, . . . . Answer. The given equation has infinitely many solutions t = + , where k is any integer k = 0, +/-1, +/-2, . . . .