
To find: the exact value of the trigonometric expression.

Answer to Problem 14.3.4EP
Explanation of Solution
Given:
Concept used:
The exact value of the trigonometric expression will be defined from the unit
Some unit circle doesn’t provide enough value of angle so the angle should be taken reference to angle in the unit circle by taking difference or sum to make the appropriate angle which has value in the unit circle.
According to the
Calculation:
Since, the value of
According to the trigonometric identities:
From the unit circle the value of the angle can be deduced.
Hence,
Chapter EP Solutions
Algebra 2
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