TrigSimplify Command

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TrigSimplify[ <Expression> ]
Simplifies the given trigonometric Expression.
Examples:
TrigSimplify[1 - sin(x)^2] gives -sin²(x)+1.
TrigSimplify[sin(x)^2 - cos(x)^2 + 1] gives 2 sin²(x).

CAS Syntax

TrigSimplify[ <Expression> ]
Simplifies the given trigonometric Expression.
Examples:
TrigSimplify[1 - sin(x)^2] gives cos²(x)
TrigSimplify[sin(x)^2 - cos(x)^2 + 1] gives 2 sin²(x).
Note:
This command works for the variable x only! (TrigSimplify[1 - sin(y)^2] gives -sin²(y) + 1.)
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