Opposite side length = 9
Adjacent side length = 12
Hypotenuse side length = 15
sin∅ is found with (opposite/hypotenuse). Therefore, sin∅ = 9/15.
cos∅ is found with (adjacent/hypotenuse). Therefore, cos∅ = 12/15.
tan∅ is found with (opposite/adjacent). Therefore, tan∅ = 9/12.
The answer is D.