- #1
kkinsky
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Homework Statement
got a vector F (105,300,140)
magnitude: 347.3
it wants the angles, 3 of them with the axis x y z
Homework Equations
all my calculations has lead to the wrong answer, but the correct answer is (180-myanswer)
why is that?
The Attempt at a Solution
using AB = |A||b| cos α formula
so with an x-axis the coordinates are (1,0,0)
FX/|F||X|=cos(x-axis angle)
arcos(105/347.3) = x-axis angle
getting the answer: 72.4degrees
the "correct" answer is 107.6
meaning 180-72.4, why am i getting this 180degree descrepency?