Please calculate 10 and 11. In examle there is number 12.
Hint: ctg(x) = cos(x) / sin(x)
Examle of task 12:
package main
import (
"fmt"
"math"
)
func main() {
fmt.Println("Enter a: ")
var a float64
_, err := fmt.Scanln(&a)
if err != nil {
fmt.Println("Error in reading a.")
return
}
z1 := math.Sin(4*a) * math.Cos(2*a) / (1+math.Cos(4*a)) / (1+math.Cos(2*a))
fmt.Println("z1 = ", z1)
b := 3 * math.Pi / 2 - a
z2 := math.Cos(b) / math.Sin(b)
fmt.Println("z2 = ", z2)
fmt.Println("Press enter to continue...")
fmt.Scanln()
}