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**Unformatted text preview: **y ( t ), we set y ( t ) = r 7 3 e 2 t sin 2 3 t + + 7 e 2 t cos 2 3 t + = 0 sin ( 2 3 t + ) cos ( 2 3 t + ) = 7 p 7 / 3 = 3 tan 2 3 t + = 3 . Since tan = 3 when = ( / 3)+ n , where n is an integer, we see that the relative extrema will occur at the points t n , where 2 3 t n + = 3 + n t n = ( / 3) + n 2 3 . 239...

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