ordinary differential equations ODE

Please can somebody help wite a fuction containing these ODEs that i would be able to use ODE45 to solve it?

[Stephan]

This is a nice assignment, but you should come up with a try on your own before you can expect help here. Other peoples homework is not what this forum is for.

[Eduardt Petrick]

function D= ODEsys(v)

theta=pi/8;

c=0.72;

g=9.81;

m=80;

s=0.5;

xdot=v*cos(theta);

ydot=v*sin(theta);

thetadot=(-g/v)*cos(theta);

vdot=(-D/m)-g*sin(theta);

end

that is what i have but its wrong i was just hoping other had different insight to me

[Eduardt Petrick]

i Just what to know how to write thr system of ODEs as a function