How do i Fixed not enough input arguments in this equation?

z=A*exp^(-(R9/2*m)*t)*cos(2*pi()*V_t*t+B);

Answer 1

[madhan ravi]

A=1;
B=4;
R9=10;m=3;
V_t=7;
t=0:.01:1;
z=A*exp(-(R9/2*m)*t).*cos(2*pi()*V_t*t+B);