Find the angle Q between the two vectors.
u = 10i + 40j v = -3j+8k
cos <10,40,0> <0,-3,8> / sqrt1700 sqrt73
cos(-120/sqrt1700 sqrt73) = .9072885394
arc cos (.9072885394) = 24.86 degrees.
Is this correct?
3 answers
What happened to the - sign in the Cosine term? I think that changes the angle significantly.
I am not sure what to change.
cosine is negative in the second and third quadrant.
1 answer