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Integral of tan^2x with u-substitution | Calculus 1 Exercises

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We integrate tan^2(x) using u-substitution/change of variables. If we rewrite tan(x)^2 as (sin(x)/cos(x))^2 which equals sin^2x/cos^2x we will be able to apply the Pythagorean identity and solve the integral easily. #apcalculus #calculus1
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