#3**+2 **

Can't use the tangent here

We know the side adjacent to the 28° angle and we are trying to find the side opposite the right angle (the hypotenuse )

And the trig function that relates the adjacent side and the hypotenuse is the cosine

cos (angle measure ) = adjacent / hypotenuse

oos ( 28° ) = 11 / x multiply both sides by x

x cos (28°) = 11 divide both sides by cos (28°)

x = 11 / cos (28° ) = 12.46

CPhill Feb 12, 2018