# Worksheet: Solving Equations Using Cofunction Identities

Q1:

Simplify .

• A
• B
• C
• D

Q2:

Simplify .

• A
• B
• C
• D

Q3:

Which of the following is the general solution of the equation ?

• A or , where
• B or , where
• C or , where
• D or , where

Q4:

is a trapezium where , , , and . Find .

• A
• B
• C
• D

Q5:

is a square where . Find the exact value of .

• A
• B
• C
• D

Q6:

Simplify .

• A
• B
• C
• D

Q7:

Find the value of .

Q8:

Find the value of given .

Q9:

Find the value of given .

Q10:

Find the value of given .

Q11:

Simplify .

• A
• B
• C
• D

Q12:

Simplify .

• A
• B
• C
• D

Q13:

Find in degrees given where is an acute angle.

• A
• B
• C
• D

Q14:

Find in degrees given where is an acute angle.

• A
• B
• C
• D

Q15:

Find in degrees given where is an acute angle.

• A
• B
• C
• D

Q16:

Simplify .

• A
• B
• C
• D

Q17:

Find in degrees given where is an acute angle.

• A
• B
• C
• D

Q18:

Simplify .

• A
• B
• C
• D

Q19:

Simplify .

• A
• B
• C
• D

Q20:

Simplify .

• A
• B
• C
• D

Q21:

Simplify .

• A
• B
• C
• D

Q22:

Simplify .

• A
• B
• C
• D

Q23:

Simplify .

• A
• B
• C
• D

Q24:

Simplify .

• A
• B
• C
• D

Q25:

Which of the following is equivalent to ?

• A
• B
• C
• D