# Worksheet: Angle Sum and Difference Identities

Q1:

Simplify .

• A
• B
• C
• D

Q2:

Simplify .

• A
• B1
• C
• D0

Q3:

Evaluate .

• A0
• B1
• C
• D

Q4:

Which of the following is equivalent to ?

• A
• B
• C
• D

Q5:

Find the value of .

• A
• B
• C
• D

Q6:

Find the value of .

• A
• B
• C
• D

Q7:

Does , given and ?

• Ano
• Byes

Q8:

Evaluate .

• A
• B
• C
• D

Q9:

Evaluate .

• A
• B
• C
• D

Q10:

Evaluate .

• A
• B
• C0
• D1

Q11:

Evaluate .

• A0
• B1
• C
• D

Q12:

Find the value of without using a calculator.

• A0
• B
• C
• D1

Q13:

Find the value of without using a calculator.

• A
• B
• C
• D

Q14:

Evaluate .

• A
• B
• C0
• D1

Q15:

, and are three angles of a triangle where and . Does ?

• Ano
• Byes

Q16:

Evaluate without using a calculator.

• A
• B
• C
• D

Q17:

Evaluate without using a calculator.

• A
• B
• C
• D

Q18:

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

Q19:

Find .

• A
• B
• C
• D

Q20:

Find given .

• A
• B
• C
• D

Q21:

Find given .

• A
• B
• C
• D

Q22:

Find given .

• A
• B
• C
• D