In triangle ABC, angle C is 90 degrees. BC = 2, SinA = 0.4. Find AB.

The problem is solved by the formula for determining the sine, the formula has the following form
sinA = BC / AB
Substituting the values we know, the formula looks like this
0.4 = 2 / AB
from this we can find AB
AB = BC / sinA
AB = 2 / 0.4
AB = 5
We do a check by substituting numbers in the formula:
0.4 = 2/5
The answer is correct, the solution is correct AB = 5