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Math Help - trigonometric integrals

  1. #1
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    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.

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  2. #2
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    Quote Originally Posted by abilitiesz View Post
    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?
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  3. #3
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    Yes, I can take it from there. Thank you. I figured it out.
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