In this right triangle<span>, you are given the measurements for the hypotenuse, c, and one leg, b. The hypotenuse is always opposite the right angle and it is always the longest </span>side<span> of the </span>triangle<span>. </span>To find<span> the </span>length<span> of leg a, substitute the known values into the Pythagorean Theorem. Solve for a</span>2<span>.</span>
B.)
I can tell because the sin func starts from the top at 0 (if sin is positive)
Step-by-step explanation:

I hope it makes sense
:)