Answer:
45/53
Step-by-step explanation:
tan(U) = WV/UV = 28/45
We can consider WV = 28 and UV = 45 and compute UW using the Pythagorean theorem:
UW = √(UV² +WV²) = √(45² +28²) = 53
From the definition of the sine of an angle, we know ...
sin(W) = UV/UW = 45/53
Because the triangles are similar, ...
... sin(R) = sin(W) = 45/53
