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1.

If the angle of elelvation of sun is ______ than `45^(@)`, then length of shadow of tower will be less than the height of tower.

Answer» Correct Answer - greater.
Discussion
2.

If the angle of elevation of sun is `45^(@)`, the length of shadow and length of post are_____.

Answer» Correct Answer - equal,
Discussion
3.

Form the top of a light house 60 m high with its base at the sea-level the angle of depression of a boat is `15^(@)`. Find the distance of the boat from the foot of light house.

Answer» Correct Answer - `60((sqrt(3)+1)/(sqrt(3)-1))`m
[Hint : `cot^(@)` = `(sqrt(3)+1)/(sqrt(3)-1)`, use this value. ]
Discussion
4.

C. Fill in the balnks : the suns angle of elevation increases from `30^(@)` to `60^(@)`, the length of shadow of a post _______.

Answer» Correct Answer - decreases,
Discussion