z(a,b):=a+b*%i;

f(a,b):=sin(z(a,b));

f(x,y);

realpart(f(x,y));

imagpart(f(x,y));

realpart(f(5,-2));

float(%);

imagpart(f(5,-2));

float(%);

Cosh(e,x):=(e^x+e^(-x))/2;

Sinh(e,x):=(e^x-e^(-x))/2;

sin(x)*Cosh(2.71828,y);

cos(x)*Sinh(2.71828,x);