Sin = opposite/ hypotenuse = O / H
Sin (30) = opposite / hypotenuse = 1 / 2
We need to find the adjacent side = sqrt( H^2 - O^2 ) = sqrt ( 2^2 - 1^2 ) = sqrt (4 - 1) =
sqrt (3)
Cos(30) = adjacent / hypotenuse = sqrt (3) / 2
Tan (30) = opposite / adjacent = 1 / sqrt (3) = sqrt (3) / 3