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# C4 Integrating tanx watch

1. When you integrate tanx, do you get ln(secx) or -ln(cosx)?

Which one is correct or are they both correct?

If they are both correct, then why?

Thanks
2. (Original post by jasminetwine)
When you integrate tanx, do you get ln(secx) or -ln(cosx)?

Which one is correct or are they both correct?

If they are both correct, then why?

Thanks
they are both correct

bottom differentiates to top when writen as sinx/cosx or substitution
3. ln(secx) is exactly the same as ln(1/cosx) = ln[(cosx)^-1] and by using power rule with logs this is -ln(cosx)
4. Both are correct; they are the same thing.

Note that Ln(2) is the same as -Ln(1/2).
5. (Original post by jasminetwine)
When you integrate tanx, do you get ln(secx) or -ln(cosx)?

Which one is correct or are they both correct?

If they are both correct, then why?

Thanks

So

6. So as you can see, everyone is just repeating the same thing.
7. Thank you so much for your help guys! This makes a lot more sense now!

Have a fab rest of the weekend!

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