## ** 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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Tue Dec 3 17:39:00 MST 1996

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