$$ \int \sin x \, dx = -\cos x + C $$ $$ \int \cos x \, dx = \sin x + C $$ $$ \int \sec^2 x \, dx = \tan x + C $$ $$ \int \csc^2 x \, dx = -\cot x + C $$ $$ \int \sec x \tan x \, dx = \sec x + C $$ $$ \int \csc x \cot x \, dx = -\csc x + C $$
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