roselin
evaluate indefinite integrals
intergral tan^2x Sec^2x dx



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shubhamsrg
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let tax x = z
hope this helps ?

roselin
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you mean tanx= z?

shubhamsrg
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yep..the very same! o.O

roselin
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okay, then how do I proceed from there?

shubhamsrg
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if tanx =z
what will be the value of dx/dz ?

roselin
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would you mind writing down the whole problem and explaining it ? I am getting confused

shubhamsrg
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ofcorse i'd mind!:P
i can only help..its you who got to try on your own! :D

roselin
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Well, to try it I should have an idea about where and how to start it. So can you at least tell me how to start the problem

shubhamsrg
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you even done substitution problems before?
for example, if i ask you
integrate (2x / (x^2 +1)) .. how will you do it ?

roselin
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No I have not done that

shubhamsrg
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then you should begin from the beginning.. you should not attempt these kinda problems for now..start from the basics..

shubhamsrg
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hmmm..