krypton
please cAN SOMEONE HELP ME WITH INTEGRATION,TRIGONOMETRIC SUBSTITUTION?



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krypton
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dw:1354135394557:dw

krypton
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what do i do in this,since is not in the form of (x^2 + 2^2)^1/2 where i can easily use x= a tan(theta)

hkm91
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in denominator

krypton
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yeah

krypton
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my proff say we need to use trig substitution in this,but i dont know how to apply it here

hkm91
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x= (2 sq rt) tan(theta)

krypton
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why is that so?

hkm91
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to make it sec (theta)

krypton
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thanks u are the best,didnt know it was gonna be (2sqrt) thats my confusion