Please help. Show workings.. Thank you

Question

1. Sin(∠K) =
2. Cos(∠K) =
3. Tan(∠K) =

Answer 1

then by pythagorean, the hypotenuse is

sqrt( 20^2 + 21^2) =

sqrt( 400 + 441) =

sqrt( 841) = 29

sin K = 21/29

cos K = 20/29

tan K = 21/20