Error [1109]

i have got a prob in the math.c/h when i use the prog it wrotes me
C:\Copy of CAM\math.h:5:Error [1109] type mismatch in redeclaration of ‘sin’
what should i do and whats the problam??

A different definition of “sin” has been used somewhere else in your code.
Try searching your project files for sin to locate the offending duplicate.

please provide the code causing the error so that we may better judge what the problem is, I beleive that you probably sent in the wrong number of variables to the function