| Functions | Meaning |
| Trigonometric | |
| acos(x) | Arc cosine of x |
| asin(x) | Arc sine of x |
| atan(x) | Arc tangent of x |
| atan 2(x,y) | Arc tangent of x/y |
| cos(x) | Cosine of x |
| sin(x) | Sine of x |
| tan(x) | Tangent of x |
| Hyperbolic | |
| cosh(x) | Hyperbolic cosine of x |
| sinh(x) | Hyperbolic sine of x |
| tanh(x) | Hyperbolic tangent of x |
| Other Functions | |
| ceil(x') | x rounded up to nearest integer |
| exp(x) | e to the power x (e^x) |
| fabs(x) | Absolute value of x |
| floor(x) | x rounded down to the nearest interger |
| fmod(x,y) | Remainder of x/y |
| log(x) | Natural log of x, x>0 |
| log10(x) | Base 10 log of x, x>0 |
| pow(x,y) | x to the power y |
| sqrt(x) | Square of x, x>=0 |
Remember this: To use Math functions in C program, you mush include header file #include<math.h>
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