Don't you mock me:
∫ sin x / [1 - sin^2(x)] dx
∫ sin x / cos^2(x) dx
∫ (sin x / cos x)(1 / cos x) dx
∫ (tan x)(sec x) dx
sec x + C
∫ sin x / [1 - sin^2(x)] dx
∫ sin x / cos^2(x) dx
∫ (sin x / cos x)(1 / cos x) dx
∫ (tan x)(sec x) dx
sec x + C