- #1
lanzjohn
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Homework Statement
The diagram below shows two vectors, A and B, and their angles relative to the coordinate axes as indicated.
DATA: alpha = 42.7 degrees,
beta = 60.0 degrees,
A = 6.70 cm.
The vector A - B is parallel to the -x axis (points due West). Calculate the y component of vector B.
Homework Equations
SOH CAH TOA
The Attempt at a Solution
So I can't figure out what I am doing wrong. I thought I knew these basics! ARG Anyway I got one chance left. So please let me know if I'm right
Well I found the angle of the triangle I am trying to find vecor y for. I am using the right triangle Since the sum vector (A-B) has no y-component, vector A must have the same y-component as vector B.
So:
90-42.7=47.3
cos47.3 = x/6.7
6.7 * cos47.3=x
Answer:
x=4.54367 cm
And that's it! BUT NOOOOO its not right ha. Is it suppose to be -4.54367cm because the component y is going y-? Or maybe I am just pig headed and am missing a major part in the problem.