Question:

Let P = (3, 1, -2), Q = (1, t+1, 2), and R = (11, t+1,4).

Last updated: 7/17/2022

Let P = (3, 1, -2), Q = (1, t+1, 2), and R = (11, t+1,4).

Let P = (3, 1, -2), Q = (1, t+1, 2), and R = (11, t+1,4). For which values of t will the angle between the vectors PQ and PR (a). be a right angle? If there are no such values, explain why. (b). be an acute angle (i.e. less than 90 degrees)? If there are no such values, explain why.