Answer :

Answer:

A

Step-by-step explanation:

Using the sine ratio in the right triangle

sin40° = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{AC}{AB}[/tex] = [tex]\frac{AC}{10}[/tex]

Multiply both sides by 10, then

10 × sin40° = AC → A

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