Answer:

Step-by-step explanation:
Recall the mnemonics SOH CAH TOA.
SOH means the Sine ratio is Opposite over Hypotenuse.
This implies that;

The side opposite to angle A is 4cm and the hypotenuse is 5cm.

Answer:
you do 12 times 3 which equals 36 so 36 is your answer
OPTION C is the correct answer.
Hope it helps you.