ASIN / NAN

[beakie]

1) Why does asin(28.867514) not return a number?
2) How can I check for -1.#IND000 in c++?

[Benjay]

isnan() in cmath.h

or u can define it also

#define isnan(x) ((x) != (x))

[ToniAz]

I think it's is because you need to input the value in radians, try asin(28.867514*PI/180);

[guestgulkan]

See here:
http://www.cplusplus.com/reference/clibrary/cmath/asin/