Chapter 2, Problem 69P

For the vectors in the earlier figure, find (a) $\left(\stackrel{\to }{\text{A}}\times \stackrel{\to }{\text{F}}\right)\cdot \stackrel{\to }{\text{D}}$ , (b) $\left(\stackrel{\to }{\text{A}}\times \stackrel{\to }{\text{F}}\right)\cdot \left(\stackrel{\to }{\text{D}}\times \stackrel{\to }{\text{B}}\right)$ , and (c) $\left(\stackrel{\to }{\text{A}}\cdot \stackrel{\to }{\text{F}}\right)\cdot \left(\stackrel{\to }{\text{D}}\times \stackrel{\to }{\text{B}}\right)$ .