红宝石 | BigDecimal cos()函数
BigDecimal#cos() : cos()是一个 BigDecimal 类方法,它将余弦值返回到指定的精度位数,数字。
Syntax: BigDecimal.cos()
Parameter: BigDecimal values
Return: the value of cosine to the specified number of digits of precision, numeric.
示例 #1:cos() 方法的示例
# Ruby code for BigDecimal.cos() method
# loading library
require 'bigdecimal'
require 'bigdecimal/util'
require "bigdecimal/math"
include BigMath
# declaring bigdecimal
a = BigMath.cos(BigDecimal("10"), 2).to_s
# declaring bigdecimal
b = BigMath.cos(BigDecimal("0"), 1).to_s
# declaring bigdecimal
c = BigMath.cos(BigDecimal("-1"), 3).to_s
# cos() method
puts "BigDecimal a cos method : #{a}\n\n"
puts "BigDecimal b cos method : #{b}\n\n"
puts "BigDecimal c cos method : #{c}\n\n"
输出 :
BigDecimal a cos method : -0.83907152907645246825216692820607553E0
BigDecimal b cos method : 0.1E1
BigDecimal c cos method : 0.540302305868139718063666551191971443E0
示例 #2:
# Ruby code for BigDecimal.cos() method
# loading library
require 'bigdecimal'
require 'bigdecimal/util'
require "bigdecimal/math"
include BigMath
# declaring bigdecimal
a = BigMath.cos(BigDecimal("120"), 2).to_s
# declaring bigdecimal
b = BigMath.cos(BigDecimal("1.0"), 4).to_s
# declaring bigdecimal
c = BigMath.cos(BigDecimal("-3"), 1).to_s
# cos() method
puts "BigDecimal a cos method : #{a}\n\n"
puts "BigDecimal b cos method : #{b}\n\n"
puts "BigDecimal c cos method : #{c}\n\n"
输出 :
BigDecimal a cos method : 0.81418097052656177616342509565903133E0
BigDecimal b cos method : 0.540302305868139717171666551191971443E0
BigDecimal c cos method : -0.9899924966004454524570754831726682E0