Answer:
6.494
Step-by-step explanation:
For a right triangle, the tangent of an angle can be found by dividing its adjacent side by the opposite side (adjacent/opposite). In this case, the tangent of x is the side AC divided by the side CB (note that CB is also the height of the tree). We know that AC=10m so we get
tan(x) = tan(33) = 0.6494 = 10/CB
CB = 10*0.6494 = 6.494
