英文:
Golang basic trigonometry arctan computation
问题
这是一个三角函数101的问题。不幸的是，我对基本的三角函数记忆不太好（太老了:）。我需要找到一个在Golang中计算给定系数的角度的公式。举个例子：
Tan(角度) = 系数
角度 = arctan(系数)
例子：
角度 = arctan(0.2) = 11.31度（其中系数=0.2）
角度 = arctan(0.3) = 16.699度（其中系数=0.3）
角度 = arctan(0.5) = 26.565度（其中系数=0.5）
下面的链接提供了一个计算器，显示了正确的值：
http://www.rapidtables.com/calc/math/Tan_Calculator.htm
根据这些例子，我该如何推导出一个用Golang编写的公式来计算给定系数的角度？
提前感谢你的时间。
Bharat
英文:
This is a Trig 101 question. Unfortunately, I don't remember my basic trig too well (too old :). I need to find a formula in Golang to compute the angle in degrees given the coefficient. As an example:
Tan(angle) = coefficient
Angle = arctan (coefficient)
Examples:
Angle = arctan(0.2) = 11.31 degrees (where coefficient = 0.2)
Angle = arctan(0.3) = 16.699 degrees (where coefficient = 0.3)
Angle = arctan(0.5) = 26.565 degrees (where coefficient = 0.5)
The URL below gives the calculator which is showing the correct values:
http://www.rapidtables.com/calc/math/Tan_Calculator.htm
Given these examples, how do I derive a formula written in Golang to compute the angle in degrees given the coefficient?
Thanks in advance for your time.
Bharat
答案1
得分: 2
这是你要翻译的内容：
package main
import (
"fmt"
"math"
)
func main() {
fmt.Println("Tan: ", math.Tan(90))
fmt.Println("Arctan: ", math.Atan(0.2))
fmt.Println("Arctan: ", math.Atan(0.3))
fmt.Println("Arctan: ", math.Atan(0.5))
}
英文:
package main
import (
"fmt"
"math"
)
func main() {
fmt.Println("Tan: ", math.Tan(90))
fmt.Println("Arctan: ", math.Atan(0.2))
fmt.Println("Arctan: ", math.Atan(0.3))
fmt.Println("Arctan: ", math.Atan(0.5))
}
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