Question

15 points if you answer the question

Answer 1

The mnemonic SOH CAH TOA helps you remember that

... Sin = Opposite/Hypotenuse

The side opposite angle K is marked with length 5. The hypotenuse KM is marked with length 10. Using the above relationship ...

... sin(∠K) = 5/10 = 1/2

The first choice is appropriate: $\dfrac{1}{2}$