Staffy
Solve
x¨ + x = sin3t, x(0) = 0, x˙(0) = 1.
[Hint: you may ﬁnd it helpful to write sin3x = a sin x + b sin 3x and solve for a and b.



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Staffy
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mahmit2012
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not work

mahmit2012
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I try to install again.wait

mahmit2012
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It is downloading.

mahmit2012
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do you know how we can solve integral of sin^4x ?

Staffy
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I do not

mahmit2012
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dw:1355067733034:dw

mahmit2012
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Unfortunately it is not write in a right space!

mahmit2012
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x2=sinx and c=sin^3x