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paul c

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express 20sin theta + 4 cos theta as R sin(theta + alpha)R sin(theta + alpha) = R cos(alpha)sin(theta) + R sin(alpha)cos(theta)
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Express 10sin(ƒÖ.t+ƒÎ�€4) in the form AsinƒÖ.t + BcosƒÖ.t
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