Module

Provides mathematical functions.

Example:

require "bigdecimal/math"

include BigMath

a = BigDecimal((PI(100)/2).to_s)
puts sin(a,100) # => 0.10000000000000000000......E1
Class Methods

Computes the value of e (the base of natural logarithms) raised to the power of decimal, to the specified number of digits of precision.

If decimal is infinity, returns Infinity.

If decimal is NaN, returns NaN.

Computes the natural logarithm of decimal to the specified number of digits of precision, numeric.

If decimal is zero or negative, raises Math::DomainError.

If decimal is positive infinity, returns Infinity.

If decimal is NaN, returns NaN.

Instance Methods

Computes e (the base of natural logarithms) to the specified number of digits of precision, numeric.

BigMath.E(10).to_s
#=> "0.271828182845904523536028752390026306410273E1"

Computes the value of pi to the specified number of digits of precision, numeric.

BigMath.PI(10).to_s
#=> "0.3141592653589793238462643388813853786957412E1"

Computes the arctangent of decimal to the specified number of digits of precision, numeric.

If decimal is NaN, returns NaN.

BigMath.atan(BigDecimal.new('-1'), 16).to_s
#=> "-0.785398163397448309615660845819878471907514682065E0"

Computes the cosine of decimal to the specified number of digits of precision, numeric.

If decimal is Infinity or NaN, returns NaN.

BigMath.cos(BigMath.PI(4), 16).to_s
#=> "-0.999999999999999999999999999999856613163740061349E0"

Computes the sine of decimal to the specified number of digits of precision, numeric.

If decimal is Infinity or NaN, returns NaN.

BigMath.sin(BigMath.PI(5)/4, 5).to_s
#=> "0.70710678118654752440082036563292800375E0"

Computes the square root of decimal to the specified number of digits of precision, numeric.

BigMath.sqrt(BigDecimal.new('2'), 16).to_s
#=> "0.1414213562373095048801688724E1"