- #1
goaliejoe35
- 72
- 0
What is the sum of the following four vectors in (a) unit-vector notation, and as (b) a magnitude and (c) an angle? Positive angles are counterclockwise from the positive direction of the x axis; negative angles are clockwise.
http://edugen.wiley.com/edugen/courses/crs1650/art/qb/qu/c03/eq03_84.gif
My Answers:
a) (-3.18m)i + (4.73m)j
b) 5.70 m
c) -56.09 degrees
Part C was marked wrong and I don't understand why... i did tan inverse of (4.73/-3.18) to get my answer. Could someone tell me what I did wrong?
http://edugen.wiley.com/edugen/courses/crs1650/art/qb/qu/c03/eq03_84.gif
My Answers:
a) (-3.18m)i + (4.73m)j
b) 5.70 m
c) -56.09 degrees
Part C was marked wrong and I don't understand why... i did tan inverse of (4.73/-3.18) to get my answer. Could someone tell me what I did wrong?