Atn Edit

Function Edit

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Syntax Edit

radianAngle# = atn( expr )

Description Edit

Returns the arctangent of expr in radians. In other words, if expr represents the tangent of some angle, then atn(expr) returns the angle. The returned angle will be in the range of -π/2 to +π/2 radians (which corresponds to -90 to +90 degrees). atn always returns a double-precision result.

Example Edit

Because atn(1) equals π/4, you can use atn to get a value for π.

dim pi#
end globals

pi = atn( 1 ) * 4
print pi

Program output:


Notes Edit

No special notes.

See Also Edit

sin; cos; tan; asin; acos; atan

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