http://www.mathhelpforum.com/math-he...-4-x-2-dx.html
hi,
can anyone explain why sub X = 2 sin (theta) ?
http://www.mathhelpforum.com/math-he...-4-x-2-dx.html
hi,
can anyone explain why sub X = 2 sin (theta) ?
Inorder to do it by integration by substitution
-Have you read the complete thread?
-What's the main question you have?
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--If it is that we can substitute this directly in the formula
----than the formula is also derived like this
It's just a matter of manipulating it to use certain trigonometric identities.
If your integrand contains something of the form:
- use so you can use the identity:
- use so you can use the identity:
- use so you can use the identity:
The question posed in this thread is an example of the first.