Referring to the figure, find the unknown
length X.

sin30°=x/50

1/2=x/50

2x=50×1

2x=50

x=50/2

x=25

tan30°=25/y

tell me if it's wrong.

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square