How do I plot these two graphs with the array/set of inputs?

Hello.

I'm trying to plot 5 trajectories corresponding to Theta = 0.4, 0.6, pi/4, 1.0, 1.2 
Where the given functions are
Vx=V*Cos(theta)
Vy=V*Sin(theta)-9.8

Here is my Mfile, don't think I'm right.

%Question 1 - plotting five trajectories corresponding to 
% Theta = 0.4, 0.6, pi/4, 1.0, 1.2 
clc;clear;
x = 0.001:6*pi
V = 120
theta = ([0.4 0.6 pi/4 1.0 1.2])
steps=size(x,2);
Vo = 0:0.01:6*pi;
Vx = V*Cos(theta)
Vy = V*Sin(theta) - 9.8

% Graph of  Vx*Cos(theta)
plot(Vo,Vx,'-b','Linewidth',2)
grid on
hold on

% Graph of Vo*Sin(theta) - 9.8
plot(Vo,Vy,'-r','Linewidth',2)
hold off

Thanks for the help

[Matthias]

First of all sin() and cos() have no capital letters. The big problem is that your formulars Vx=V*Cos(theta) Vy=V*Sin(theta)-9.8 are independend of x and y. When you wanted do create you vectors with 1885x5 values you only created a 1x5 vector since theta is the only vector that contributes to Vx and Vy. Vo isn't used later in the program.

If you correct your initial forumlars we could help you more. If the formulars are correct try this: plot(Vx,Vy,'-b','Linewidth',2);

[Azzi Abdelmalek]

What is x ? why x is not used? please clarify your question

Answer 1

[Azzi Abdelmalek]

%Question 1 - plotting five trajectories corresponding to 
% Theta = 0.4, 0.6, pi/4, 1.0, 1.2 
clc;
clear;
V = 120
theta = ([0.4 0.6 pi/4 1.0 1.2])
Vo = 0:0.01:6*pi;
Vx = V*cos(bsxfun(@times,Vo',theta))
Vy = V*sin(bsxfun(@times,Vo',theta)) - 9.8
% Graph of  Vx*cos(theta)
plot(Vo,Vx,'-b','Linewidth',2)
grid on
hold on
% Graph of Vo*sin(theta) - 9.8
plot(Vo,Vy,'-r','Linewidth',2)
hold off