
Concept explainers
a.
Exact value Trigonometric function at the given real number.
a.

Answer to Problem 22E
Explanation of Solution
Given information:
Formula used:
Finding value by using reference angle of given angle.
Reference angle for different quadrant:
1st quadrant:
2nd quadrant:
3rd quadrant:
4th quadrant:
Finding co-terminal angle
As angle lies in 2nd quadrant. So,
As
b.
Exact value Trigonometric function at the given real number.
b.

Answer to Problem 22E
Explanation of Solution
Given information:
Formula used:
Finding value by using reference angle of given angle.
Reference angle for different quadrant:
1st quadrant:
2nd quadrant:
3rd quadrant:
4th quadrant:
As angle lies in 2nd quadrant. So,
As
c.
Exact value Trigonometric function at the given real number.
c.

Answer to Problem 22E
Explanation of Solution
Given information:
Formula used:
Finding value by using reference angle of given angle.
Reference angle for different quadrant:
1st quadrant:
2nd quadrant:
3rd quadrant:
4th quadrant:
Finding co-terminal angle
As angle lies in 1st quadrant. So,
As
Chapter 5 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
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