End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

class method

Math.sin

Math.sin(x) → float

static VALUE
math_sin(VALUE unused_obj, VALUE x)
{
    return DBL2NUM(sin(Get_Double(x)));
}

Returns the sine of x in radians.

Domain: (-INFINITY, INFINITY).
Range: [-1.0, 1.0].

Examples:

Example

sin(-PI)   # => -1.2246063538223773e-16 # -0.0000000000000001
sin(-PI/2) # => -1.0
sin(0.0)   # => 0.0
sin(PI/2)  # => 1.0
sin(PI)    # => 1.2246063538223773e-16  # 0.0000000000000001

See also .log2 .sinh .log10 .sqrt also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0

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