- #1
- 10
- 0
A(vec)=(2,1,-4) B(vec)=(-3,0,1) C(vec)=(-1,-1,2)
whats the angle between Avec and Bvec in rads.
i know the formula
A(vec)*B(vec)= abs(A)*abs(B)*cos(theta)
A(vec)*B(vec)=-10
so why wont cos^-1(-10/(21)(10)) work?
whats the angle between Avec and Bvec in rads.
i know the formula
A(vec)*B(vec)= abs(A)*abs(B)*cos(theta)
A(vec)*B(vec)=-10
so why wont cos^-1(-10/(21)(10)) work?