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In each of the problems, determine ω0, R, and δ so as to write the given...

In each of the problems, determine ω0, R, and δ so as to write the given expression in the form u = R cos (ω0t − δ).

u = 3 cos(2t) + 4 sin(2t)

u = −2 cos (πt) −3 sin(πt)

please explain your work thank you

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