step 1
solve for y
Remember that
sin(30)=1/2
and
sin(30)=y/4
so
1/2=y/4
y=(1/2)*4
step 2
Solve for x
Applying the Pythagorean Theorem
4^2=x^2+y^2
4^2=x^2+2^2
x^2=4^2-2^2
x^2=16-4
x^2=12
5.8m questions
7.5m answers