Ruby methods ending in ! mean that the method makes in-place, or destructive, changes to an object, not to a copy of it.
Method(s) Description
Math.acos, Math.acos! Arc cosine
Math.acosh, Math.acosh! Hyperbolic arc cosine
Math.asin, Math.asin! Arc sine
Math.asinh, Math.asinh Hyperbolic arc sine
Math.atan, Math.atan!, Math.atan2, Math.atan2! Arc tangent; atan takes an x argument; atan2 takes an x and a y argument
Math.atanh, Math.atanh! Hyperbolic arc tangent
Math.cos, Math.cos! Cosine
Math.cosh, Math.cosh Hyperbolic cosine
Math.sin, Math.sin! Sine
Math.erf Error function
Match.erfc Complementary error function
Math.exp, Math.exp! Base x of Euler
Math.frexp Normalized fraction and exponent
Math.hypot Hypotenuse
Math.ldexp Floating-point value corresponding to a given mantissa and exponent
Math.sinh, Math.sinh! Hyperbolic sine
Math.sqrt, Math.sqrt! Square root
Math.tan, Math.tan! Tangent
Math.tanh, Math.tanh! Hyperbolic tangent
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