Answer: These exercises use results from plane geometry to obtain exact values of the
Chapter 5, Problem 83(choose chapter or problem)
These exercises use results from plane geometry to obtain exact values of the trigonometric functions of 15. Start with a right triangle ACB having a 60 angle at A and a 30 angle at B. Let the hypotenuse of this triangle have length 2. Extend side BC and draw a semicircle with diameter along BC extended, center at B, and radius AB. Draw segment AE. (See the figure.) Any angle inscribed in a semicircle is a right angle, so triangle EAD is a right triangle. Work Exercises 7784 in order. Show that AE has length 26 - 22 and find sin 15.
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