Using Angle Between Two Vectors

[nycmathguy]

Section 6.4

Please do (50) in step by step fashion as a guide for me to do the rest.

 

[Country Boy]

If you were able to do the other problems then surely you know that
u.v= ||u||||v|| cos(theta).

For problem 50, u.v= 9(36) cos(3pi/4)= 324(-0.7071)= --229.1.

 

[nycmathguy]

If you were able to do the other problems then surely you know that
u.v= ||u||||v|| cos(theta).

For problem 50, u.v= 9(36) cos(3pi/4)= 324(-0.7071)= --229.1.

Now I know what to do. I will do the rest this weekend.