a tree casts a shadow 40m long when the sun rays are at an angle of 36 degrees to the ground. How tall is the tree?
tan(an angle) = (length of side opposite) / (length of side adjacent)
tan(36º) = 40 / x
x * tan(36º) = 40
x = 40 / tan(36º)
x ≈ 55.055 m
+37 
