i have this question.
C(2,-1,5) D (-3, 4,2)
have to find angle that CD make with the posotive y axis. The answer is 49d 23m.
d is degrees, m is minutes. Didn't know how to do the symbols.
I know the formula Theta= cos^-1 (C.D/ |C|.|D|) to get an angle but i think this is respect to x axis??
im using it and getting an angle of 90?
How do i find angle with respect to y axis?