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Recent questions tagged Trigonometry
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If in ∆ ABC, cotA+ cotB+cotC=cotx, then prove that, sin^3(x) =sin(A-x) sin(B-x) sin(C-x)?
asked
Jul 11
in
Class XII Maths
by
Swarna
(
5
points)
trigonometry
trigonometric functions
0
votes
0
answers
If in ∆ ABC, cotA+ cotB+cotC=cotx, then prove that, sin^3(x) =sin(A-x) sin(B-x) sin(C-x)?
asked
Jul 10
in
Class XII Maths
by
Swarna
(
5
points)
trigonometry
0
votes
1
answer
A man standing on the bank of a river observes that the angle of elevation of a tree on the opposite bank is 60˚.
asked
Apr 2
in
Class X Maths
by
muskan15
(
-3,451
points)
trigonometry
0
votes
1
answer
From the top of a hill, the angles of depression of two consecutive kilometer stones, due east are found to be 30˚ and 45˚ respectively.
asked
Apr 1
in
Class X Maths
by
navnit40
(
-4,953
points)
trigonometry
0
votes
1
answer
The angle of elevation of a cloud from a point 200 metres above a lake is 30˚ and the angle of depression of its reflection in the lake is 60˚.
asked
Apr 1
in
Class X Maths
by
navnit40
(
-4,953
points)
trigonometry
0
votes
1
answer
The angles of elevation of the top of a tower from two points A and B at distance of a and b respectively from the base and in the same straight line with it are complementary.
asked
Apr 1
in
Class X Maths
by
navnit40
(
-4,953
points)
trigonometry
0
votes
1
answer
An aeroplane at an altitude of 250 m observes the angle of depression of two boats on the opposite banks of a river to be 45˚ and 60˚ respectively.
asked
Apr 1
in
Class X Maths
by
navnit40
(
-4,953
points)
trigonometry
0
votes
1
answer
As observed from the top of a 80 m tall lighthouse, the angles of depression of two ships on same side of the light house in horizontal line with its base are 30˚ and 40˚ respectively.
asked
Apr 1
in
Class X Maths
by
navnit40
(
-4,953
points)
trigonometry
0
votes
1
answer
Two person standing on the same side of a tower in a straight line with it measure the angle of elevation of the top of the tower as 25˚ and 50˚ respectively.
asked
Apr 1
in
Class X Maths
by
priya12
(
-12,654
points)
trigonometry
0
votes
1
answer
Vertical tower is 20 m high. A man standing at some distance from the tower knows that the cosine of the angle of elevation of the top of the tower is 0.53.
asked
Apr 1
in
Class X Maths
by
priya12
(
-12,654
points)
trigonometry
0
votes
1
answer
A round balloon of radius ‘a’ subtends an angle θ at the eye of the observer while the angle of elevation of its centre is ɸ.
asked
Apr 1
in
Class X Maths
by
priya12
(
-12,654
points)
trigonometry
0
votes
1
answer
A man is standing on the deck of a ship, which is 10 m above water level. He observes the angle of elevation of the top of a hill as 60˚ and the angle of depression of the base of the hill as 30˚.
asked
Apr 1
in
Class X Maths
by
priya12
(
-12,654
points)
trigonometry
0
votes
1
answer
From two points A and B on the same side of a building, the angles of elevation of the top of the building are 30˚ and 60˚ respectively.
asked
Apr 1
in
Class X Maths
by
priya12
(
-12,654
points)
trigonometry
0
votes
1
answer
An aeroplane when 3000 metres high passes vertically above another aeroplane at an instance when their angles of elevation at the some observation point are 60˚ and 45˚ respectively.
asked
Apr 1
in
Class X Maths
by
aditya23
(
-2,193
points)
trigonometry
0
votes
1
answer
Two men on either side of a temple 75 m high observed the angle of elevation of the top of the temple to be 30˚ and 60˚ respectively.
asked
Apr 1
in
Class X Maths
by
aditya23
(
-2,193
points)
trigonometry
0
votes
1
answer
A man on the top of vertical observation tower observes a car moving at a uniform speed coming directly towards it.
asked
Apr 1
in
Class X Maths
by
aditya23
(
-2,193
points)
trigonometry
0
votes
1
answer
The shadow of a vertical tower on a level ground increases by 10 m when the altitude of the sun changes from 45˚ to 30˚.
asked
Apr 1
in
Class X Maths
by
aditya23
(
-2,193
points)
trigonometry
0
votes
1
answer
A pole being broken by the wind the top struck the ground at an angle 30˚ and at a distance of 8 m from the foot of the pole.
asked
Apr 1
in
Class X Maths
by
aditya23
(
-2,193
points)
trigonometry
0
votes
1
answer
A vertical tower stands on a horizontal plane and is surmounted by a flagstaff of height 7 metres.
asked
Apr 1
in
Class X Maths
by
navnit40
(
-4,953
points)
trigonometry
0
votes
1
answer
A man observes the angle of elevation of the top of a building to be 30˚.
asked
Apr 1
in
Class X Maths
by
navnit40
(
-4,953
points)
trigonometry
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