Question

please solve question 11.

Answer 1

tan45=1 from example tanx=4/y hence 4=y
tan30=1/√3 from example 4-x/y
4-x/y=1/√3
4-x/4=1/√3
4-x=4/√3
X=4-4/√3
=4√3-4/√3

$\sqrt{3}$