# Worksheet: Evaluating Trigonometric Functions Using Cofunction Identities

Q1:

Find given where is a positive acute angle.

• A
• B
• C
• D

Q2:

Which of the following is equal to ?

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• D

Q3:

Find the value of given where .

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• D

Q4:

Find the value of given where .

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Q5:

Find the value of given where .

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• D

Q6:

Find the value of giving the answer in its simplest form.

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• D

Q7:

Find the value of .

• A2
• B1
• C
• D
• E

Q8:

is a right-angled triangle at . Find given .

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• D

Q9:

Simplify .

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Q10:

Simplify .

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• D

Q11:

Simplify .

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Q12:

Simplify .

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Q13:

Simplify .

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• D

Q14:

Simplify .

Q15:

Simplify .

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• D

Q16:

Simplify .

Q17:

Simplify .

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• D

Q18:

Simplify .

• A
• B0
• C
• D

Q19:

Simplify .

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• D

Q20:

Simplify .

Q21:

Simplify .

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• D

Q22:

Simplify .

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• D

Q23:

Simplify .

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• D

Q24:

Simplify .

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• D

Q25:

Simplify .

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• D