Which trigonometric ratios are correct for triangle abc? check all that apply

Consider an angle M with measure m≠90°, in a right triangle.

Let

OPP denote the length of the side opposite to M,
ADJ denote the length of the side adjacent to M, and 
HYP denote the hypotenuse.

then: 

Sin(M) = OPP/HYP
Cos(M)= ADJ/HYPP
Tan(M)=OPP/ADJ

Back to our problem, 

using the Pythagorean we can find the length of AB: 









1, 3, 4

1+1=22×1=22-1=11-1=1duh