Vector from angle and length
Hello, I need a little help again, I have been working on this for a couple hours, and I am stuck.
In my textbook I have this problem:
Find the vector that has a length of 5 and an angle of 220 with positive x axis on the form ai+bj
My best guess so far has been this:
(I have not been able to simplify this more)
and written it as this:
Now i controlled this by checking this:
But the answer provided in the back of the textbook is this:
My question is:
What am I doing wrong? I am completely stuck.
Re: Vector from angle and length