7.2 Integration Techniques
Question #3 (Medium): Evaluating the Integral of Tangent & Secant With Even Power
Trigonometric integrals usually have sine paired with cosine; tangent with cosine; and cotangent with
cosecant. They are usually never any other way around.
When tangent is paired with even power secant, keep one and change everything else to tangent
based on the identity . It does not matter whether tangent is of even