U-Substitution: Step-by-Step Method and Examples
U-substitution reverses the chain rule. A 5-step method for choosing u, 7 worked examples, definite integrals with changed limits, and common mistakes.
Tag: u-substitution
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Integral of tan(x): −ln|cos x| + C Derivation
The integral of tan(x) is −ln|cos x| + C, or equivalently ln|sec x| + C. Step-by-step u-substitution, definite examples and tan²x.