Tan()

The Tan() function returns the tangent of an angle given in radians. The math library must be imported in order to use this function.

Syntax

result := math.Tan(angle)

Where result is the tangent value of angle, returned as a float, except under the following circumstances:

• The result of Tan(-Inf) is NaN
• The result of Tan(+Inf) is NaN
• The result of Tan(NaN) is NaN

Example

The following calculates the tangent of angle and prints out the result:

package main

import (
  "fmt"
  "math"
)

func main() {
  angle := math.Pi / 6
  tangent := math.Tan(angle)
  fmt.Printf("%.1f\n", tangent)
}

The output will be:

0.6

Codebyte Example

The following example is runnable and shows how the Tan() function handles infinite values.

Code
Output
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Run