Answer
$y=\dfrac{5}{12}\sin 2t+0.6435$
Work Step by Step
$y=\sqrt {(1/3)^2+(1/4)^2} \sin 2t+\arctan \dfrac{1/4}{1/3}$
This implies that $y=\dfrac{5}{12}\sin 2t+0.6435$
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