Compute the dot product for each of the subsequent equation
(a) v^{→} = 5i^{→} - 8j^{→} , w^{→} = i^{→} + 2j^{→}
(b) a^{→} = (0, 3, -7) , b^{→} = (2, 3,1)
Solution
(a) v^{→} • w^{→} = 5 -16 = -11
(b)^{ }a^{→} • b^{→} = 0 + 9 = 2
Not much more to do with these other than use the formula.