Answer
The height of the CN Tower is equal to 0.8762 km
Work Step by Step
$base. = 1 \space km$
$base.=1000 m \space\
$\theta = 28.81 ^o $
$$tan \space \theta = \frac{opp.}{adj.}$$ $$opp. = 1 \space km \times tan\space (28.81^o) \approx 0.5499 \space km$$
