
(a)
The Quadrant in which
(a)

Answer to Problem 39E
Second Quadrant
Explanation of Solution
Given:
The given expression is
Here u is in 4th quadrant and
Hence,
(b)
To Find: The exact values of
(b)

Answer to Problem 39E
Explanation of Solution
Given: To find the exact values of
FORMULA USED:
HALF ANGLE FORMULA:
The given expression is
Here, Sin is positive whereas Cos and Tan are negative because u/2 lies in Second Quadrant
Hence,
Chapter 5 Solutions
Precalculus with Limits
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