# Find ‘sin’ ‘cos’ and ‘tan’ values of a ‘degree’ in C

### Find ‘sin’ ‘cos’ and ‘tan’ values of a ‘degree’ in C :

We have one standard *math.h* library function in C that helps to find the ‘sin’, ‘cos’ and ‘tan’ value of a degree. In this tutorial, we will learn how to calculate these values from a user input *degree value. Let’s take a look how to do this :*

### C program :

#include<stdio.h> #include<math.h> int main(){ double degree; printf("Enter your angle value in degree : "); scanf("%lf",°ree); double radian = degree * (M_PI/180); printf("sin value is %lf \n",sin(radian)); printf("cos value is %lf \n",cos(radian)); printf("tan value is %lf \n",tan(radian)); return 0; }

### Explanation :

1. To solve this problem, first we need to import *math.h* header function.

2. All of these methods takes one *double* value as argument and returns the result as *double*.

3. The argument should be in *radian*, so if the user input is in degree, we need to convert it to radian by multiplying the value *PI/180*. *MI_PI* is defined in *math.h* and it holds the value of *PI*.

4. After converting it to radian, we can calculate and print out the *sin*, *cos* and *tan* values.

5. To make the conversion, just use *sin()*, *cos()* and *tan()* methods.

### Sample Output :

Enter your angle value in degree : 60 sin value is 0.866025 cos value is 0.500000 tan value is 1.732051 sin value is 0.500000 cos value is 0.866025 tan value is 0.577350 Enter your angle value in degree : 45 sin value is 0.707107 cos value is 0.707107 tan value is 1.000000