Primitive of Tangent Function/Cosine Form

Theorem

 * $\displaystyle \int \tan x \rd x = -\ln \size {\cos x} + C$

where $\cos x \ne 0$.

Also see

 * Primitive of Sine Function
 * Primitive of Cosine Function


 * Primitive of Cotangent Function


 * Primitive of Secant Function
 * Primitive of Cosecant Function