**Helpful Links**

**Mark Scheme**

**Working**

f(

*x*) = 4 sin

*x*°

(a) Find f(23)

Give your answer correct to 3 significant figures.

g(

*x*) = 2

*x*– 3

b) Find fg(34)

Give your answer correct to 3 significant figures.

h(*x*) = (*x* + 4)^{2}

Ivan needs to solve the following equation h(*x*) = 25

He writes

This is not fully correct.

(c) Explain why

(c) Explain why

**Question**

10) f(

(a) Find f(23)

Give your answer correct to 3 significant figures.

*x*) = 4 sin*x*°(a) Find f(23)

Give your answer correct to 3 significant figures.

**[1 mark]**

g(

b) Find fg(34)

Give your answer correct to 3 significant figures.

*x*) = 2*x*– 3b) Find fg(34)

Give your answer correct to 3 significant figures.

**[2 marks]**

h(*x*) = (*x* + 4)^{2}

Ivan needs to solve the following equation h(*x*) = 25

He writes

This is not fully correct.

(c) Explain why

**[1 mark]**