trigonometric integrals

**abilitiesz** · November 8th 2009, 07:30 PM

Hi, I need some help on this trig integral problem.

Can anyone tell me how to start this? I know I need to use some kind of identity to change the sec to cos or sin? Thank you.

**WhoCares357** · November 8th 2009, 08:57 PM

Originally Posted by abilitiesz

Hi, I need some help on this trig integral problem.

Can anyone tell me how to start this? I know I need to use some kind of identity to change the sec to cos or sin? Thank you.

$\int 54x^4sec^4(x^5)dx$
$54\int x^4(sec^2(x^5))(sec^2(x^5))dx$
$54\int x^4(sec^2(x^5))(1+tan^2(x^5))dx$

Can you take it from here?

**abilitiesz** · November 8th 2009, 09:32 PM

Yes, I can take it from there. Thank you.

I figured it out.

Thread: trigonometric integrals

LinkBack

Thread Tools

Display