Subject: Math, asked 3 hours, 1 minute ago

## A person standing on the bank of a river, observes that the angle of elevation of the top of a tree, standing on the opposite bank is 45 ̊. When he moves 40 m away from the bank, he finds the angle of elevation to be 30 ̊. Find the height of the tree and the width of the river.  (take root 3 as 1.732)

Subject: Math, asked 3 hours, 15 minutes ago

## A person standing on the bank of a river,observes that the angle of elevation of the top of a tree, standing on the opposite bankis 45 ̊. When he moves 40 m away from the bank, he finds the angle of elevation to be 30 ̊. Find the height of the tree and the width of the river.  (take root 3 as 1.732)

Subject: Math, asked 7 hours, 5 minutes ago

## How come this value of tan(A+B) is given?...Please explain.

Subject: Math, asked 22 hours, 18 minutes ago

## Trigonometry simply means calculateons with triangles (that?s where the tri comes from). It is a study of relationships in mathematics involving lengths, heights and angles of different triangles. The field emerged during the 3rd century BC, from applications of geometry to astronomical studies. Trigonometry spreads its applications into various fields such as architects, surveyors, astronauts, physicists, engineers and even crime scene investigators. Some basic terms involved in heights and distances are Trigonometry can be used to solve problems that use an angle of elevation or depression. These problems can be visualised by drawing diagrams which involves right triangles and hence can calculate the required heights and distances Harsha and Deepak were planning to do a project in application of trigonometry for class 10. They went to a nearby park with measuring tape and clinometer ( an instrument to measure the angle of elevation and depression ) . Give answers to the questions by drawing a suitable diagram in each cases. ( a ) They first planned to find the ratio of height of two trees. ( say h1 and h2 ) . Harsha found the angle of elevation of two trees of height h1 and h2 as 60? and 30? respectively, by standing in the midpoint of line joining two trees . h1 : h2 is _______________ ( 2 marks ) ( b ) They saw a lamp post which is 6m high having a shadow of length 2 ?3 m, they wished to find the elevation of Sun. The elevation of sun is ---------------- ( c ) They saw two buildings ( A and B ) with horizontal distance between them as 15m. Deepak was standing on top of 24m high building ( B ) and observed the angle of elevation of top of the other building ( A ) as 30 ?. They want to find the height of building A . The height of building A is -------------------- ( d ) In the play area , they saw a ladder which was erected straight. They both climbed the ladder. Harsha was standing on a step ?A? which is 2m above the ground and Deepak was standing on the step ? B? , which is 4m vertically above ?A?. At an instant, the angles of elevation of balloon from A and B are observed to be 60? and 30? respectively. They want to find the height of the balloon from the ground . Height of the balloon from the ground is __________________

Subject: Math, asked 1 day, 18 hours ago

Subject: Math, asked 2 days, 3 hours ago

## Please solve this question with explanation of each step...Thank you

Subject: Math, asked 2 days, 6 hours ago

## Please solve this question with explanation of each step...

Subject: Math, asked 3 days, 1 hour ago

## Make it equal

Subject: Math, asked 3 days, 23 hours ago

## Sachii dosti be -juban h.oti hai, Ye to ankho se byan ho.ti hai, Dosti me dard mile to kya.. Dard me hi dosti ki pahechan ho.ti hai.

Subject: Math, asked 4 days, 20 hours ago

## An electric pole is 10?3 m high and its shadow is 10 m in length, then the angle of elevation of the sun is ?

Subject: Math, asked 5 days, 21 hours ago

## Boring app Byee guys....

Subject: Math, asked 5 days, 22 hours ago

## The angle of elevations of a building from two points on he ground 9m and 16m away from the foot of the building are complementary, the height of the building is ?

Subject: Math, asked 5 days, 22 hours ago

## a plane is observed to be approaching the airport. It is a distance of 12 km from the point of observation and makes an angle of elevation of 60 degree .Find its height above the ground in kilometres

Subject: Math, asked 5 days, 22 hours ago

## The angle of depression of the top and bottom of a tower as seen from the top of a 100m high cliff are 30? and 60? respectively. Find the height of the tower.

Subject: Math, asked 5 days, 22 hours ago

## The tops of two poles of height 10m and 18m are connected with wire. If wire makes an angle of 30? with horizontal, then length of wire is ?

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