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FilledSmallSquare FunctionExpand[expr] tries to expand out special and certain other functions in expr, when possible reducing compound arguments to simpler ones.

FilledSmallSquare FunctionExpand[expr, assum] expands using assumptions.

FilledSmallSquare FunctionExpand uses a large collection of rules.

FilledSmallSquare FunctionExpand applies to certain trigonometric functions as well as special functions.

FilledSmallSquare FunctionExpand is automatically called by FullSimplify.

FilledSmallSquare Assumptions in FunctionExpand can be specified as in Simplify.

FilledSmallSquare Example: FunctionExpand[expr, x Reals] performs expansion assuming that x is real.

FilledSmallSquare FunctionExpand has the option Assumptions, specifying default assumptions to be appended to assum.

FilledSmallSquare The default setting for the Assumptions option is $Assumptions.

FilledSmallSquare You can specify default assumptions for FunctionExpand using Assuming.

FilledSmallSquare See Section 3.2.13.

FilledSmallSquare Implementation Notes: see Section A.9.5.

FilledSmallSquare See also: TrigExpand, TrigToExp, ComplexExpand, FullSimplify.

FilledSmallSquare New in Version 3; modified in 5.0.

Further Examples