GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/math.h: In function `int main()':
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/math.h:150: error: too many arguments to function `double acos(double)'
0_0_10645372_30175.cpp:37: error: at this point in file
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