Recent content by daniel_encinares

indefinite integral of this: ? { [(tan^2 (x)) (1 + sin^2 (x))] / [cos^2 (x)] } dx I know that you have to substitute an 'inner function' to a variable, say "u", and express everything in terms of "u". That's my problem, i don't know what 'inner function' I should substitute. PLEASE HELP :(...

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