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CBSE Notes 2011-2012 » XI-Maths

Trigonometric Functions

Assuming that a person of a normal sight can read print at such a distance that the letters subtend ...

Short answer question

Assuming that a person of a normal sight can read print at such a distance that the letters subtend an angle of 5'at his eye. Find what is the height of the letters that he can read at a distance of 15 metres.

The moon's distance from the earth is 360000 km and its diameter subtends an angle of 31' at the eye...

Short answer question

The moon's distance from the earth is 360000 km and its diameter subtends an angle of 31' at the eye of the observer on the earth. Find the radius of the moon.

Assuming the average distance of the earth from the sun to be 92,500,000 km and the angle subtended ...

Short answer question

Assuming the average distance of the earth from the sun to be 92,500,000 km and the angle subtended by the sun at the eye of a person on the earth to be 32', find the sun's diameter.

A train is travelling on a curve of 700 m radius at 14 km/hr, Through what angle will it turn in one...

Short answer question

A train is travelling on a curve of 700 m radius at 14 km/hr, Through what angle will it turn in one minute ?

A person of normal eye-sight can read a print at such a distance that the letters subtend an angle o...

Short answer question

A person of normal eye-sight can read a print at such a distance that the letters subtend an angle of 5' at the eye. Find the height of the letters if he can read at a distance of 420 metres.

If the angular diameter of the moon be 30', how far from the eye a coin of diameter 2.2 cm be kept t...

Short answer question

If the angular diameter of the moon be 30', how far from the eye a coin of diameter 2.2 cm be kept to hide the moon ?

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