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OpenStudy (anonymous):
Set 2*sin(x) + 3*cos(x) = C*cos(x+d). Expand the right-hand side and solve for C and d.
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myininaya (myininaya):
\[\sin(d)\sin(x)+\cos(d)\cos(x)=\cos(x-d)\] |dw:1328404418705:dw|
myininaya (myininaya):
we want sin(d)=2 and cos(d)=3 so we have |dw:1328404462699:dw|
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