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floor(x) rounds x to largest integer not greater than x
pow(x,y) x raised to power y (xy)
fmod(x) remainder of x/y as floating-point number
sin(x) sine of x (x in radian)
math. h — Floating-point math functions nan() , nanf() , and nanl() functions are supported under IEEE only. For the C99 math functions, it is required to define the feature test macro _ISO_C99_SOURCE or requires a compiler that is designed to support C99 to expose the functionality.
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