NAME atan, atanf, atanl - arc tangent function LIBRARY Math library ( libm , -lm ) SYNOPSIS #include double ... atan(double x ); float atanf(float x ); long double atanl(long dou…NAME atan, atanf, atanl - arc tangent function LIBRARY Math library ( libm , -lm ) SYNOPSIS #include double ... atan(double x ); float atanf(float x ); long double atanl(long dou…NAME atan, atanf, atanl - arc tangent function LIBRARY Math library ( libm , -lm ) SYNOPSIS #include double ... atan(double x ); float atanf(float x ); long double atanl(long dou…that exp(i * pi) == -1 */ #include /* for atan */ #include #include int main(void) { double ... atan(1.0); double complex z = cexp(I * pi); printf("%f + %f * i\n", creal