0_0.... it's so simple. -sqrt(9-x^2) +C

thanks so much for your help. do you mind if i ask another question?

i have to have the int of sec (x/2)

am I on the right track?

= 1/cos(x/2)

t=cos(x/2)

t dt= -1/2sin(x/2)

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- Sep 9th 2009, 08:30 PM #16

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