math.h

abs : Return absolute value of integer parameter
acos : Calculate arccosine
asin : Calculate arcsine
atan : Calculate arctangent
atan2 : Calculate arctangent, 2 parameters
atof : Convert string to double
ceil : Return the smallest integer that is greater or equal to x
cos : Calculate cosine
cosh : Calculate hyperbolic cosine
exp : Calculate exponential
fabs : Return absolute value of floating-point
floor : Round down value
fmod : Return remainder of floating point division
frexp : Get mantissa and exponent of floating-point value
labs : Return absolute value of long integer parameter
ldexp : Get floating-point value from mantissa and exponent
log : Calculate natural logarithm
log10 : Calculate logarithm base 10
modf : Spli floating-point value into fractional and integer parts
pow : Calculate numeric power
sin : Calculate sine
sinh : Calculate hyperbolic sine
sqrt : Calculate square root
tan : Calculate tangent
tanh : Calculate hyperbolic tangent