Ummm.. I think i couldn't express my problem. I can understand why is that angle is 90 + theta. My problem is different.
If you take triangle which has a pink vector leftward and green vector which making an angle of alpha with the pink vector (where alpha is 90 - theta) and put the Vy...
Homework Statement
Actually this is not a problem. This is about something i couldn't understand.
Homework Equations
where wt equals θ
The Attempt at a Solution
I can understand that x=r.cosθ it is obvious. But i can't understand why Vx=-V.sin(w.t) When i take a triangle from that...