How to Find the Sin and Cos Value of a Number in Golang?

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 can find the value of sin and cos of the specified number with the help of Sincos() 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 Sincos() function.

Syntax:

func Sincos(a float64) (sin, cos float64)

• If you pass -Inf or +Inf in this function like Sincos(-Inf) or Sincos(+Inf), then this function will return NaN, NaN.
• If you pass -0 or +0 in this function like Sincos(-0) or Sincos(+0), then this function will return -0 or +0, 1.
• If you pass NaN in this function like Sincos(NaN), then this function will return NaN, NaN.

Example 1:

// Golang program to illustrate the Sincos() Function

package main

import (
    "fmt"
    "math"
)

// Main function
func main() {

    // Using Sincos() function
    res_1, res_2 := math.Sincos(math.Pi / 3)
    res_3, res_4 := math.Sincos(0)
    res_5, res_6 := math.Sincos(math.Inf(-1))
    res_7, res_8 := math.Sincos(math.NaN())
    res_9, res_10 := math.Sincos(math.Pi)

    // Displaying the result
    fmt.Printf("Result 1: %.1f, %.1f", res_1, res_2)
    fmt.Printf("\nResult 2: %.1f, %.1f", res_3, res_4)
    fmt.Printf("\nResult 3: %.1f, %.1f", res_5, res_6)
    fmt.Printf("\nResult 4: %.1f, %.1f", res_7, res_8)
    fmt.Printf("\nResult 5: %.1f, %.1f", res_9, res_10)

}

Output:

Result 1: 0.9, 0.5
Result 2: 0.0, 1.0
Result 3: NaN, NaN
Result 4: NaN, NaN
Result 5: 0.0, -1.0

Example 2:

// Golang program to illustrate the Sincos() Function

package main

import (
    "fmt"
    "math"
)

// Main function
func main() {

    // Using Sincos() function
    nvalue_1, nvalue_2 := math.Sincos(math.Pi / 2)
    nvalue_3, nvalue_4 := math.Sincos(math.Pi / 3)

    // Sum of the given sin values
    res1 := nvalue_1 + nvalue_3
    fmt.Println("Sum of Sin Values:")
    fmt.Printf("%.2f + %.2f = %.2f\n",
            nvalue_1, nvalue_3, res1)

    // Sum of the given cos values
    res2 := nvalue_2 + nvalue_4
    fmt.Println("Sum of Cos Values:")
    fmt.Printf("%.2f + %.2f = %.2f",
           nvalue_2, nvalue_4, res2)

}

Output:

Sum of Sin Values:
1.00 + 0.87 = 1.87
Sum of Cos Values:
0.00 + 0.50 = 0.50