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Dec6-11, 10:50 PM
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Quote Quote by schapman22 View Post
Why doesn't substitution work to find 0∫2 sqrt(4-x^2). I kn ow you can find the integral in other ways. I am just curious why regular substitution won't work. Thank you in advance.
But substitution does work. Make the substitution x = 2cos(θ). Isn't that a "substitution"?