With the aid of the trigonometric identi tics tana - tan~
Chapter 0, Problem 12.6(choose chapter or problem)
With the aid of the trigonometric identi tics tana - tan~ tan(u - ~) = I + tan a tan ~ ., tana +cota = --. sin 2a show how solution (3) in the example in Sec. 135 is obtained from the expression for ;r V(r. 0) just prior to that solution.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer