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Mathematics, 02.04.2021 16:30 mathhelppls14

Find all solutions to the equation cosxcos(3x)+sinxsin(3x)=0 on the interval [0,2pi]

Find all solutions to the equation cosxcos(3x)+sinxsin(3x)=0 on the interval [0,2pi]

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Find all solutions to the equation cosxcos(3x)+sinxsin(3x)=0 on the interval [0,2pi]
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