{{keywords>wiki library source code example reference}} ====== asin ====== double asin(double); calculates arcsine from a number ===== cpp Sourcecode Example ===== #include /* including standard library */ #include /* including math library */ using namespace std; int main ( void ){ double a=0.2, res=0; res = asin(a) * 90 / 3.17; //cout.setf(ios::fixed, ios::floatfield); cout.precision(8); cout << "asin from " << a << " is " << res << endl; return 0; } ===== output ===== output: asin from 0.2 is 5.7167864