Math Help - trigonometric integrals

1. trigonometric integrals

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.

2. 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?

3. Yes, I can take it from there. Thank you. I figured it out.