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Trigonometric Substitution

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Betel

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Karma Points: 3,134

Date Posted: 7/23/2008 9:19:33 PM Status: Live

Asker's Rating: Lifesaver

Response:

WTS:

Use trig identity 1 - sin²x = cos²x

Let x = 2sinθ x² = 4sin²θ
dx = 2cosθ dθ

QED

Hope that helps!

Laerck's Comment:

Thanks for the help

When I post a solution I assume you have some level of mathematical sophistication. (For instance, if you post a question about differential equations, I'll assume you know how to take derivatives; if you post an algebra question, I'll try to provide more detail.) If anything doesn't make sense, feel free to PM me for clarification. No amount of degrees can prevent mistakes; if you find one in my work, please let me know.

In the time it took you to read that, the universe expanded by 300 trillion cubic light years :)

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Trigonometric Substitution

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