Method: Math#tan

Defined in:
math.c

#tan(x) ⇒ Float (private)

Returns the tangent of x in radians.

  • Domain: (-INFINITY, INFINITY).

  • Range: (-INFINITY, INFINITY).

Examples:

tan(-PI)   # => 1.2246467991473532e-16  # -0.0000000000000001
tan(-PI/2) # => -1.633123935319537e+16  # -16331239353195370.0
tan(0.0)   # => 0.0
tan(PI/2)  # => 1.633123935319537e+16   # 16331239353195370.0
tan(PI)    # => -1.2246467991473532e-16 # -0.0000000000000001

Returns:



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# File 'math.c', line 167

static VALUE
math_tan(VALUE unused_obj, VALUE x)
{
    return DBL2NUM(tan(Get_Double(x)));
}