TRIGONOMETRIC EQUATIONS - Exercise 3 TRIGONOMETRIC EQUATIONS - Exercise 3
Find all solutions of the equation 
in the
interval 
.
Solution:
We first find all solutions of the related equation
(see Example 1), and find that 
and
, 
, comprise all the
solutions. Hence
from which it follows that
The solution angles A which lie in the interval are
therefore
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Luis Valdez-Sanchez