Question 1170332
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    function           period


    y = 2cos(2x/3)     {{{(2T)/3}}} = {{{2pi}}}  ==== T = {{{3pi}}}.

    y = 6sin(3x)       3T = {{{2pi}}}    ====> T = {{{2pi/3}}}.

    y = -3tan(3x)      3T = {{{pi}}}     ====> T = {{{pi/3}}}.


Apply the same logic in remaining cases and complete the assignment on your own.
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