Vector Problems: Ans to A+B & A-B | Magnitude & Dir. vs West

[tjnguyen]

Hi i need help with some online homework but i can't seem to get the right answer.
Vector A has a magnitude of 70 units and points due west, while vector B has the same magnitude and points due south. Find the magnitude and direction of (a) A + B and (b) A - B . Specify the directions relative to due west.

for part a) i got mag = 99 with angle of 45 degreees south of west and b) same thing but north of west am i doing something wrong?

 

[hage567]

Are you getting both a) and b) wrong, or just b)? You are likely not specifying the angle properly from the due west direction.