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Mathorio

Worksheet

Cofunction Identities

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Show your work for each problem.

1.
What is the cofunction of ?
1. a)
2. b)
3. c)
4. d)
2.
Two angles are complementary if they sum to:
1. a)
2. b)
3. c)
4. d)
3.
If , what is ?
4.
What is the complement of ?
5.
Which identity is correct?
1. a)
2. b)
3. c)
4. d)
6.
Simplify to the form . What is ?
7.
What is ?
1. a)
2. b)
3. c)
4. d)
8.
Verify that
9.
If , find (in degrees).
10.
Simplify
11.
Which of the following equals ?
1. a)
2. b)
3. c)
4. d)
12.
Solve for : where
13.
Solve for : where
14.
Prove that for all
15.
In radians, the cofunction identity uses which value?
1. a)
2. b)
3. c)
4. d)