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how can i get A cos (omega t) + B sin (omega t)

into this form: C cos (omega t + theta) ?

does it equal to A+B cos (omega t - 90) ???

i know it has to do with the underdamped response of an RLC circuit. i

was looking into phasors as well.

any help would be greatly appreciated.

mark

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# Homework Help: RLC ckt's underdamped response

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