Explanation:
solution:
A.
relation between hypotenuse and base is given by cos angle
so
=base/hypotenuse=11/x
cos37°=11/x
x=11/(cos37°)=13.77units
side indicated =x=13.77units
solution:
B.
relation between perpendicular and base is given by tan angle
so
=perpendicular/base=4/13
ø=tan-¹ (4/13)=17.10°
angle indicated =ø=17.10°