## 5 thoughts on “4.21”

1. tutorpaul says:

The textbook gives $l_1 = 1.5$ in. and $l_2 = 6$ in.

1. blake.wallace95 says:

This problem is represented as 4.23 in the 11th edition

2. Taylor Glenn says:

How did you get 0.125 for phi?... why did you just ignore the sin^-1(0.125) which would give you 7.1807 for phi