Use the right triangles to find the ratios.
Sin 30 degrees
draw the triangle:
hypotensue 2, opposite side 1, adjacent side sqrt3
sin=1/2
You really, really need to memorize 30/60 and 45/45 right triangles, and do it quickly.
Sin 30 degrees
hypotensue 2, opposite side 1, adjacent side sqrt3
sin=1/2
You really, really need to memorize 30/60 and 45/45 right triangles, and do it quickly.