Answer:
Correct choice is B
Step-by-step explanation:
Unknown leg x in right triangle is opposite to the angle of the measure of 50°. Use the definition of the sine of the angle:
[tex]\sin \alpha=\dfrac{\text{opposite leg}}{\text{hypotenuse}}.[/tex]
Hence,
[tex]\sin 50^{\circ}=\dfrac{x}{12}\Rightarrow 0.766=\dfrac{x}{12}.[/tex]
