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Finding Cosine Value of Specified Number in Golang
  • Last Updated : 01 Apr, 2020

Go language provides inbuilt support for basic constants and mathematical functions to perform operations on the numbers with the help of the math package. You are allowed to find the cosine of the specified radian argument with the help of Cos() function provided by the math package. So, you need to add a math package in your program with the help of the import keyword to access the Cos() function.

Syntax:

func Cos(y float64) float64
  • If you pass +Inf or -Inf in this function, then this function will return NaN(not-a-number).
  • If you pass NaN in this function, then this function will return NaN.

Example 1:

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// Golang program to illustrate how to find
// the cosine of the given radian argument
  
package main
  
import (
    "fmt"
    "math"
)
  
// Main function
func main() {
  
    // Finding the cosine
    // of the given value
    // Using Cos() function
    res_1 := math.Cos(math.Pi / 4)
    res_2 := math.Cos(math.Inf(-3))
    res_3 := math.Cos(0)
    res_4 := math.Cos(math.NaN())
    res_5 := math.Cos(math.Pi)
  
    // Displaying the result
    fmt.Printf("Result 1: %.1f", res_1)
    fmt.Printf("\nResult 2: %.1f", res_2)
    fmt.Printf("\nResult 3: %.1f", res_3)
    fmt.Printf("\nResult 4: %.1f", res_4)
    fmt.Printf("\nResult 5: %.1f", res_5)
}

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Output:

Result 1: 0.7
Result 2: NaN
Result 3: 1.0
Result 4: NaN
Result 5: -1.0

Example 2:

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// Golang program to illustrate how to find
// the cosine of the given radian argument
  
package main
  
import (
    "fmt"
    "math"
)
  
// Main function
func main() {
  
    // Finding cosine of
    // the given number
    nvalue_1 := math.Cos(0)
    nvalue_2 := math.Cos(math.Pi / 2)
  
    // Sum of the given values
    res := nvalue_1 + nvalue_2
  
    // Displaying results
    fmt.Printf("%.1f + %.1f = %.1f"
            nvalue_1, nvalue_2, res)
  
}

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Output:

1.0 + 0.0 = 1.0



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