C Math Function

 C Math Function

As the name suggests, the Math Functions in C language are used to perform mathematical tasks such as returning the sine, cosine, cube root, absolute value, etc. To work on Math Functions in C language, use the following header file:

math.h

Include it in your program file:

#include <math.h>

Here are the popular math functions in C language and what they will return after execution:

• sqrt(a): square root of a
• exp(a): e raised to the power of an i.e., Ea
• cos(a): cosine of a
• sin(a): sine of a
• tan(a): tangent of an angle
• acos(a): arccosine of a
• asin(a): arcsine of a
• atan(a): arctangent of a
• ceil(a): rounds upwards to its nearest integer
• floor(a): rounds a downwards to its nearest integer

Let us now see the above math functions one by one with examples:

sqrt() in C Language

The sqrt() function in C is used to get the square root of a number.

Let us now see an example of the sqrt() function:

#include <stdio.h> #include <math.h> int main() { double a = 25.0; printf("Square root of %lf is %lf", a, sqrt(a)); return 0; }

Output

Square root of 25.000000 is 5.000000

exp() in C Language

The exp() function in C is used to return e raised to the power of a.

Let us now see an example of the exp() function:

#include <stdio.h> #include <math.h> int main() { double a = 2.0; printf("Exponential value of %lf = %lf\n", a, exp(a)); return 0; }

Output

Cosine 0.523599 = 0.866025 degrees

sin() in C Language

The sin() function in C returns the sin of a.

Let us now see an example of the sin() function:

#include <stdio.h> #include <math.h> #define PI 3.14159265 int main() { double a = 60.0, res; a = (a * PI) / 180; res = sin(a); printf("Sine %lf = %lf degrees\n", a, res); }

Output

Sine 1.047198 = 0.866025 degrees

tan() in C Language
 

The tan() function in C is used to return the tangent of a.

Let us now see an example of the tan() function:

#include <stdio.h> #include <math.h> #define PI 3.14159265 int main() { double a = 60.0, res; res = tan(a); printf("Tan %lf = %lf degrees\n", a, res); }

Output

Tan 60.000000 = 0.320040 degrees

acos() in C Language

The acos() function in C returns the arc cosine of a in radians.

Let us now see an example of the acos() function:

#include <stdio.h> #include <math.h> #define PI 3.14159265 int main() { double a = -0.30, res; res = acos(a)*180/PI; printf("Cosine %lf = %lf degrees\n", a, res); }

Output

Cosine -0.300000 = 107.457603 degrees
 

asin() in C Language

The asin() function in C  returns the arc sine of a in radians.

Let us now see an example of the asin() function:

#include <stdio.h> #include <math.h> #define PI 3.14159265 int main() { double a = -0.30, res; res = asin(a)*180/PI; printf("Sine %lf = %lf degrees\n", a, res); }

 Output

Sine -0.300000 = -17.457603 degrees

atan() in C Language

The atan() function in C  returns the arc tangent of a in radians.

Let us now see an example of the atan() function:

#include <stdio.h> #include <math.h> #define PI 3.14159265 int main() { double a = -0.30, res; res = atan(a)*180/PI; printf("Tan %lf = %lf degrees\n", a, res); }

Output

Tan -0.300000 = -16.699244 degrees

cosh() in C Language

The cosh() function in C returns the hyperbolic cos of a.

Let us now see an example of the cosh() function:

#include <stdio.h> #include <math.h> int main() { double a = 2.5, res; res = cosh(a); printf("Cosh %lf = %lf\n", a, res); }

Output

Cosh 2.500000 = 6.132289

sinh() in C Language

The sinh() function in C  returns the hyperbolic sine of a.

Let us now see an example of the sinh() function:

#include <stdio.h> #include <math.h> int main() { double a = 2.5, res; res = sinh(a); printf("Sinh %lf = %lf\n", a, res); }

Output

Sinh 2.500000 = 6.050204

tanh() in C Language

The tanh() function in C  returns the hyperbolic tangent of a.

Let us now see an example of the tanh() function:

#include <stdio.h> #include <math.h> int main() { double a = 2.5, res; res = tanh(a); printf("Tanh %lf = %lf\n", a, res); }

Output

Tanh 2.500000 = 0.986614

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