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**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]**