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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, 2019
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, 2019
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, 2019
in
Class X Maths
by
muskan15
(
-3,443
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, 2019
in
Class X Maths
by
navnit40
(
-4,939
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, 2019
in
Class X Maths
by
navnit40
(
-4,939
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, 2019
in
Class X Maths
by
navnit40
(
-4,939
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, 2019
in
Class X Maths
by
navnit40
(
-4,939
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, 2019
in
Class X Maths
by
navnit40
(
-4,939
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, 2019
in
Class X Maths
by
priya12
(
-12,630
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, 2019
in
Class X Maths
by
priya12
(
-12,630
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, 2019
in
Class X Maths
by
priya12
(
-12,630
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, 2019
in
Class X Maths
by
priya12
(
-12,630
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, 2019
in
Class X Maths
by
priya12
(
-12,630
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, 2019
in
Class X Maths
by
aditya23
(
-2,145
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, 2019
in
Class X Maths
by
aditya23
(
-2,145
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, 2019
in
Class X Maths
by
aditya23
(
-2,145
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, 2019
in
Class X Maths
by
aditya23
(
-2,145
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, 2019
in
Class X Maths
by
aditya23
(
-2,145
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, 2019
in
Class X Maths
by
navnit40
(
-4,939
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, 2019
in
Class X Maths
by
navnit40
(
-4,939
points)
trigonometry
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