TAN Function

TAN(real-expression)

Returns the tangent of the given angle, where the angle is expressed in radians.

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Examples

PRINT TAN(0)

Produces 0.

PRINT TAN(PI# / 4)

Produces approximately 1.

REM Compute slope of a line from angle
angle# = RAD(30)
PRINT "Slope = "; TAN(angle#)

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Notes

• Argument must be in radians. Convert from degrees with:

  radians# = degrees * PI# / 180

• The tangent function has asymptotes where cosine is zero, i.e. at odd multiples of PI#/2. Calling TAN at these points will produce very large values or errors due to division by zero.
• Return value is a real number, unbounded in range.
• Inverse function: ATAN.

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See also: SIN · COS · ATAN · ATAN2