(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

1.∫sec^2 (4x+1)dx

2.∫ root(sin pi theta) cos(pi theta) d(theta)

3.∫ e^x dx /(1+e^x)

2. Relevant equations

1.u=4x+1

2. u= sin(pi theta)

3. u= 1+e^x

antiderivatives to find the answers..

3. The attempt at a solution

For #1, tan^4(4x+1)/4 +c..is the answer..but I don't get why tan should be ^4??

I took the deriv. of the u and replace dx with the stuff that only contains du..not dx...

And then,,I sometimes have problems solving some questions..

Please help!

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# Homework Help: Antiderivatives question

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