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Qn #1595
00:00
A man observes the angle of elevation of the top of mountain to be 30o. He walks 1000 feet nearer and
finds the angle of elevation to be $45^{o}$. What is the distance of the first point of observation from the
foot of the mountain?
Qn #1455
Two towers face each other separated by a distance of 25 meters. As seen from the top of the first tower, the angle of depression of the second tower’s base is 60° and that of the top is 30°. The height (in meters) of the second tower is
Qn #1450
A harbour lies in a direction 60° South of West from a fort and at a distance 30 km from it, a ship sets out from the harbour at noon and sails due East at 10 km an hour. The time at which the ship will be 70 km from the fort is
Qn #917
Angle of elevation of the top of the tower from 3
points (collinear) A, B and C on a road leading to the
foot of the tower are 30°, 45° and 60°, respectively.
The ratio of AB and BC is
Qn #669
A line segment AB of length 10 meters is passing through the foot of the perpendicular of a pillar, which is standing at right angle to the ground. Top of the pillar subtends angles $tan^{–1}$ 3 and $tan^{–1} 2$ at A and B respectively. Which of the following choice represents the height of the pillar?
Qn #459
The angles of depression of the top and bottom of an 8m tall building from the
top of a multi storied building are 30° and 45°, respectively. What is the height of the
multistoried building
and the distance between the two buildings?
Qn #452
A tower subtends angles $\alpha, 2\alpha$ and $3\alpha$ respectively at points A, B and C
which are lying on a horizontal line through the foot of the tower. Then $\frac{AB}{BC}$ is
equal to