Aright triangle has side lengths 5,12, and 13 as shown below.

Memorize Soh Cah Toa, which means:
sin = opposite/hypotenuse
cos = adjacent/hypotenuse
tan = opposite/adjacent

opposite & adjacent are determined based on the angle being referenced.
hypotenuse is ALWAYS opposite of the 90 degree angle.

sin Y = 12/13
cos Y = 5/13
tan Y = 12/5

Tbh i’m only here for the points

This makes absolutely no sense at all young man/women