Question

Find mLB round to nearest degree (sines and cosines)

Answer 1

If line AC is 4, line CB is 3 and the hypotenuse is 5, with it being a right triangle.

Angles
A: 36.86989764584402 or round that to 37°
B: 53.13010235415598 or round that to 53°
C: 90 (ofc)

So, B is 53 degrees approximately.