Need help with finding angles RE: finding vector components

[mizzy]

Homework Statement

See attached photo. Find the resultant displacement measured from the starting point.

Homework Equations

The Attempt at a Solution

When it comes to angles, i sometimes get confused when to add 180 or not. FOr the first two distances, we don't have to find the components. For the last, we have to break it up into x and y components.

for the third distance:
x component = -150cos30
y component = 150sin30

IN MY ASSIGNMENT, I GOT THIS WRONG.

for the fourth distance:
isn't the angle 60 degrees??

Can someone help me get this straight about assigning angles? I don't want to make a mistake on the final exam.

THANKS

 

[novop]

Yes the fourth vector has an angle of 60 degrees from the horizontal. Your work is fine so far.