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- June 6th 2007, 12:29 PM #1

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## DE question

im doing my DE HW and i dont understand how the book came out with an answer.. This is separable variables with an initial value.

(dx/dt) = 4(x^2+1) the intial value is: x((pi)/4)=1

the answer is: y= sin ((1/2)x^2+c)

and i have no idea where the sin came from...i know im probaly missing a rule somewhere, thanks for any help to get the jucices going!

- June 6th 2007, 12:57 PM #2

- June 6th 2007, 01:10 PM #3

- June 6th 2007, 01:12 PM #4

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- June 6th 2007, 05:21 PM #5

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- June 6th 2007, 05:25 PM #6

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