Documentation

Mathematica Teacher's Edition

Built-in Functions

Algebraic Computation

Formula Manipulation

TrigFactor

TrigFactor[expr] factors trigonometric functions in expr.

TrigFactor operates on both circular and hyperbolic functions.
TrigFactor splits up sums and integer multiples that appear in arguments of trigonometric functions, and then factors resulting polynomials in trigonometric functions, using trigonometric identities when possible.
See The Mathematica Book on the web: Section 1.4.5 and Section 3.3.7.
See also: TrigExpand, TrigReduce, TrigToExp, Factor, Simplify, FullSimplify.

Further Examples