求 Golang 中复数的余弦
Go 语言借助 cmplx 包，为复数的基本常数和数学函数提供内置支持。您可以借助数学/cmplx 包提供的 Cos()函数找到指定复数的余弦。因此，您需要借助 import 关键字在程序中添加一个 math/cmplx 包来访问 Cos()函数。
语法:
func Cos(y complex128) complex128
让我们借助给定的例子来讨论这个概念:
例 1:
// Golang program to illustrate how to find
// the cosine value of the given complex number
package main
import (
"fmt"
"math/cmplx"
)
// Main function
func main() {
// Finding Cosine of the
// specified complex number
// Using Cos() function
res_1 := cmplx.Cos(2 + 5i)
res_2 := cmplx.Cos(-1 + 8i)
res_3 := cmplx.Cos(-1 - 7i)
// Displaying the result
fmt.Println("Result 1:", res_1)
fmt.Println("Result 2:", res_2)
fmt.Println("Result 3:", res_3)
}
输出:
Result 1: (-30.88223531891674-67.47278844058751i)
Result 2: (805.3093276729627+1254.19468537245i)
Result 3: (296.2569584411429-461.3921082367867i)
例 2:
// Golang program to illustrate how to find
// the cosine value of the given complex number
package main
import (
"fmt"
"math/cmplx"
)
// Main function
func main() {
cnumber_1 := complex(1, 2)
cnumber_2 := complex(3, 6)
// Finding cosine
cvalue_1 := cmplx.Cos(cnumber_1)
cvalue_2 := cmplx.Cos(cnumber_2)
// Sum of two cosine values
res := cvalue_1 + cvalue_2
// Displaying results
fmt.Println("Complex Number 1: ", cnumber_1)
fmt.Println("Cosine 1: ", cvalue_1)
fmt.Println("Complex Number 2: ", cnumber_2)
fmt.Println("Cosine 2: ", cvalue_2)
fmt.Println("Sum : ", res)
}
输出:
Complex Number 1: (1+2i)
Cosine 1: (2.0327230070196656-3.0518977991518i)
Complex Number 2: (3+6i)
Cosine 2: (-199.6969662082171-28.465762393875067i)
Sum : (-197.66424320119745-31.517660193026867i)
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