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COS (value) Returns the cosine of a value which is
an angle.
Example: COS(1.047) returns
0.500171.
SIN (value) Returns the sine of a value which is
an angle.
Example: SIN(PI()/2) returns 1.
TAN (value) Returns the tangent of a value which
is an angle.
Example: TAN(2.328) returns
-1.058041.
