Question

consider the vectors u=(2,0) and v=(0,1) ,
1.determine cos theta,where theta is the angle between u and v
2.determine the area of the parallelogram by u and v

Answer 1

oh sorry i didn't see this question
\[\cos \theta = \frac{u*v}{|u||v|}\]
u*v = (2*0) +(0*1) = 0
\[\rightarrow \cos \theta = 0\]