5 Comments

  1. Once you get past all the degeneracy on the internet you realize you can educate yourself for free to a college level – thanks khan academy, for making my college work make sense

  2. Sal, I'm wondering why you didn't just take the u-sub of sin(x) from the third step after you replaced cos^2(x) with 1-sin^2(x) which would have canceled out the other cos(x) and left you to integrate 1-u^2, which would have given you u-u^3/3 and the same answer… seems that the distribution was unnecessary? Am I missing something?

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