1.

Aman observes that the angle of elevation of the top of a tower from a point P on the ground is alpha.He moves a certain distance towards the foot of the tower and finds that the age of elevation of the top has doubled. He further moves a distance3/4of the previous and finds that the ele of elevation is three times that all. The angle is given by :

Answer»

`sin alpha =3/4`
`sin alpha = 3/8`
`sin alpha = SQRT ((5)/(12))`
`cos alpha = sqrt((5)/(12)).`

ANSWER :C


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