# Worksheet: Evaluating Trigonometric Functions with Special Angles

In this worksheet, we will practice evaluating the trigonometric functions with special angles and how to use them to evaluate trigonometric expressions.

Q1:

Find the value of .

• A
• B
• C
• D

Q2:

Calculate .

• A
• B
• C
• D

Q3:

Calculate .

• A1
• B
• C
• D2

Q4:

Find the value of given that where .

Q5:

Find the value of .

• A
• B
• C
• D
• E

Q6:

Find the value of .

• A
• B
• C
• D
• E

Q7:

Find the value of .

• A
• B
• C
• D
• E

Q8:

Find .

• A
• B
• C
• D

Q9:

Evaluate .

• A
• B
• C
• D

Q10:

Find the value of .

Q11:

Evaluate .

• A
• B
• C1
• D

Q12:

Find the value of .

• A
• B
• C
• D
• E

Q13:

The intensity of an electric current is given by where is the time in seconds. Rewrite the intensity after one second using sum and product formulae in terms of special angles.

• A
• B
• C
• D

Q14:

Find the value of .

• A
• B
• C
• D
• E

Q15:

Find the value of .

• A
• B
• C
• D
• E

Q16:

Find without using a calculator.

• A
• B
• C
• D

Q17:

The intensity of an electric current is given by , where is the time in seconds. Find the intensity after one second using sum and product formulae.

• A
• B
• C
• D

Q18:

Find the value of .

• A
• B
• C
• D
• E

Q19:

Find the value of .

• A
• B
• C
• D
• E

Q20:

Find the value of .

• A
• B
• C
• D
• E

Q21:

Calculate .

• A
• B
• C
• D

Q22:

Find the value of without using a calculator, given where is an acute angle.

• A
• B2
• C
• D
• E1

Q23:

Find the value of without using a calculator, given where is an acute angle.

• A
• B1
• C2
• D0

Q24:

Find the value of without using a calculator, given where is an acute angle.

• A
• B
• C
• D
• E3

Q25:

Find the value of given .

• A
• B
• C
• D