Mathematics, 12.05.2021 21:40, unicornsflyhigh

Find all solutions to the equation cosx cos(3x) + sinx sin(3x) = 0 on the
interval (0,2pi).

Answers: 3

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Find all solutions to the equation cosx cos(3x) + sinx sin(3x) = 0 on the
interval (0,2pi)....