### CBSE X Mathematics Some Applications of Trigonometry

## angle

### CBSE X Mathematics Introduction to Trigonometry

## If 7tan Φ = 4, then find the value of 7sinΦ - 3cos Φ
—————————
7sinΦ + 3cos,Φ .

**pdcavita**18th November 2017 11:27 AM

### CBSE X Mathematics Introduction to Trigonometry

## If √3 tanΦ = 3sinΦ , then find the value of sin²Φ - cos²Φ .

**pdcavita**18th November 2017 11:35 AM

### CBSE X Mathematics Introduction to Trigonometry

## If sec A=17/8 , show that 3-4 sin ²A/4 cos² A - 3 = 3- tan² A /1-3 tan² A.

**pdcavita**18th November 2017 12:56 PM

### CBSE X Mathematics Introduction to Trigonometry

## Evaluate sec² (90°-Φ) - cot²Φ / 2 (sin²25° + sin²65°)

**pdcavita**18th November 2017 1:07 PM

### CBSE X Mathematics Introduction to Trigonometry

## Prove that sinA - cosA +1/ sinA + cosA - 1 =1/secA - tanA.

**pdcavita**18th November 2017 1:13 PM

### CBSE X Mathematics Introduction to Trigonometry

## Ohh.... Tq Q1. Prove that( cosecA - sinA) (secA - cosA) = 1/ tanA - cotA.

**pdcavita**19th November 2017 2:11 PM

### CBSE X Mathematics Some Applications of Trigonometry

## The angle of elevation of the top of a tower from certain point is 30°. If the observer moves 20m towards the tower, the angle of elevation of the top increases by 15°. Find the height of the tower.

**pdcavita**19th November 2017 2:18 PM

### CBSE X Mathematics Some Applications of Trigonometry

## The angle of elevation Φ of the top of a lighthouse as seen by a person on the ground is such that tanΦ = 5/12. When the person moves a distance of 240m towards the lighthouse, the angle of elevation becomes Φ, such that tanΦ=3/4.
Find the height of the lighthouse.

**pdcavita**19th November 2017 2:26 PM

### CBSE X Mathematics Some Applications of Trigonometry

## From a window 15m high above the ground in a street, the angles of elevation and depression of the top and foot of another house on the opposite side of the street are 30° and 45°, respectively. Show that the height of the opposite house is 23.66 m. (take √3 = 1.732)

**pdcavita**19th November 2017 2:32 PM

### CBSE X Mathematics Some Applications of Trigonometry

## The length of the shadow of a tower standing on ground level is found to be 2x m longer when the sun's altitude is 30° than when it was 45°. Prove that the height of tower is (√3 + 1)x m.

**pdcavita**19th November 2017 2:39 PM

### CBSE X Mathematics Some Applications of Trigonometry

## Sunita is an electrician and she has to repair an electric fault on a pole of height 5m. She needs to reach to a point on the pole 1.3m below the top of the pole to undertake the repair work. What should be the length of ladder that she should use which, when inclined at an angle of 60° from the horizontal, would she enable her to reach the required position ? Further how far from the foot of the pole should she place the foot of the ladder? What value is indicated from this question?

**pdcavita**19th November 2017 2:47 PM

### CBSE X Mathematics Some Applications of Trigonometry

## A spherical balloon of radius r subtends an angle Φ at the eye of an observer. If the angle of elevation of its centre is Φ , then find the height of the centre of the balloon .

**pdcavita**19th November 2017 2:53 PM

### CBSE X Mathematics Some Applications of Trigonometry

## A bird is sitting on the top of a tree which is 80 m high. The angle of elevation of the bird from a point on the ground is 45°. The bird flies away from the point of observation horizontally and remains a constant height. After 2 s, the angle of elevation of the bird from the point of observation becomes 30°. Find the speed of flying of the bird.

**pdcavita**19th November 2017 2:58 PM

### Gujarat - Gujarati Medium IX ALL Subject ત્રિકોણ

## QID : 65 - In a triangle the length of the side opposite the right angle is 9√3 cm, what is the length of the side opposite to the angle which measures 30 degree?

**aryap7964**6th December 2017 3:57 PM

### CBSE IX Mathematics Triangles

## Please solve question no. 60

**vikasg13.hardware**29th December 2017 11:28 AM

### JEE JEE (Main) Mathematics

## if a=secA-tanA , b=cosecA+cotA then a= interms of b

**bugadasuvarna**4th January 2018 9:16 PM

### CBSE X Mathematics Introduction to Trigonometry

## if cot theta= 1/ root 3, show that 1-cos square theta/ 2- sin square theta = 3/5.

**sanyam**5th January 2018 1:17 PM

### CBSE X Mathematics Introduction to Trigonometry

## Answer the following

**tultuldutta58**8th January 2018 3:20 AM

### ICSE X Mathematics Trigonometrical Identities

## Plz solve ques 51 urgently

**lovemaan5500**14th January 2018 2:18 PM

### JEE JEE (Main) Mathematics

## angle of elevation of bottom of window 10 metre above ground level is 30. a pole projecting outwards from the bottom of the window makes an angle of 30 with the wall if angle of elevtion of the pole from the same point is 60 find the height of the polewith figure pls

**risheelchheda19**15th January 2018 4:26 PM

### ICSE IX Mathematics

## ABC is a right triangle at right angled at A and AD is a median. BA is produced to E such that AB = AE and join ED. AB = 6 , BC = 10 cm , find the artea of triangle BED?

**nisha_vini29**17th January 2018 12:44 AM

### CBSE X Mathematics Introduction to Trigonometry

## oemetricaly derive the value of sin 30

**amolshukal.2001**31st January 2018 8:47 AM

### CBSE X Mathematics Introduction to Trigonometry

## Geometrical derive the value of sin zero

**amolshukal.2001**31st January 2018 8:53 AM

### CBSE XI Science Mathematics Trigonometric Functions

## If secx+tanx=4 ,find the value of sinx ,cosx, secx and tanx?

**hemanttkumarr**31st January 2018 9:30 AM

### CBSE X Mathematics Introduction to Trigonometry

## geometricaly derive the value of sin 45

**amolshukal.2001**1st February 2018 9:28 PM

### CBSE X Mathematics Introduction to Trigonometry

## Sin square 5 plus sin square 10 plus....plus sin square 85 plus cos square 45

**Interfacesystems2**1st February 2018 9:33 PM

### ICSE X Mathematics Trigonometrical Identities

## Plz answer 1 part

**lovemaan5500**4th February 2018 5:37 PM

### ICSE X Mathematics Trigonometrical Identities

## Plz.answer 2nd part

**lovemaan5500**4th February 2018 5:38 PM

### ICSE X Mathematics

## Cos2A+tan2A-1/sin2A=tan2A

**vaibhav**5th February 2018 11:04 AM

### CBSE X Mathematics

## cotØ+tanø=7 find cot2ø+tan2ø???

**tluser1**6th February 2018 1:26 PM

### ICSE IX Mathematics

## 5 sin^2s+4 cos^2s=2/9, find tan s

**Swapan**14th February 2018 2:26 PM

### CBSE X Mathematics Introduction to Trigonometry

## state true or false please explain the answer

**gpnkumar0**15th February 2018 10:00 PM

### CBSE X Mathematics

## state true or false please explain the answer

**gpnkumar0**15th February 2018 10:01 PM

### CBSE X Mathematics Introduction to Trigonometry

## state true or false please explain the answer

**gpnkumar0**15th February 2018 10:02 PM

### ICSE X Mathematics Trigonometric Ratios of Complementary Angles

## If cosec theta . cos( theta + 54) = 1, find the value of theta so that theta and (theta + 54) are acute angles.

**bdroy_2014**16th February 2018 7:54 PM

### CBSE X Mathematics

## the angle of elevation of the top of a hill at the foot of a tower is 60 degree and the angle of elevation of the top of the tower from the foot of the hill is 30 degree. if the tower is 50 m high, what is the height of the hill?

**corpordann**19th February 2018 5:27 PM

### ICSE IX Mathematics Trigonometry

## In triangle ABC, AD is perpendicular to BC. Sin B = 0.8 , BD = 9 cm and tan C = 1. Find the length of AB , AD , AC and DC .

**sactalkmail**19th February 2018 6:45 PM

### ICSE IX Mathematics Trigonometry

## In the right angled triangle ABC,angle C=90 degrees and angle B=60 degrees.If AC=6cm,find the lengths of the sides BC and AB (Hint:Use the concept of trigonometry)

**laxmi.agarwal055**21st February 2018 7:17 PM

### ICSE IX Mathematics Trigonometry

## If the lengths of each side of a rhombus is 8cm and its one angle is 60 degrees,then fing the length of diagonals of rhombus (Hint:Use the concept of trigonometry)

**laxmi.agarwal055**21st February 2018 7:18 PM

### CBSE X Mathematics Introduction to Trigonometry

## cos58/sin32+sin22/cos68-cos38cosec52/tan18 tan35 tan60 tan72 tan55

**delphinjayaprakash**21st February 2018 8:09 PM

### ICSE X Mathematics

## (sin A - cos A +1)/ ( sin A + cosA -1)= 1/( sec A - tanA)

**bdroy_2014**24th February 2018 12:48 PM

### ICSE X Mathematics

## PROVE THAT: cot A + cosec A - 1/cot A - cosec A +1 = 1 + cos A/sinA

**nethra**24th February 2018 9:44 PM

### CBSE X Mathematics Introduction to Trigonometry

## In a right angle traingle right angled at A if tanC= then find sinBcosC+cosBsinC

**arvindsahadevadharwad**26th February 2018 2:16 PM

### CBSE X Mathematics Introduction to Trigonometry

## Please solve this .

**agarwalaayush**26th February 2018 6:37 PM

### CBSE X Mathematics Introduction to Trigonometry

## Sir/mam Please solve Question 21

**Vivek.d8765**27th February 2018 4:37 PM

### CBSE X Mathematics

## $In\u2206ABC,m\angle B=90\xb0,AB=7cmandAC-BC=1cm.Determinethevaluesof\mathrm{sin}Band\mathrm{cos}B.$

**sibaramamohanty**2nd March 2018 8:12 AM

### CBSE X Mathematics

## Prove that : sin^4A+cos^A/1-2sin^2 A*cos^2 A=1

**ihsanansar123**2nd March 2018 12:52 PM

### CBSE X Mathematics Introduction to Trigonometry

## If cosØ = √(4 – x2)/2 find the values of 1) secø.tanø 2) cosecø.cotø

**gpnkumar0**4th March 2018 8:40 PM

### CBSE X Mathematics

## Q5. A tunnel makes an angle of measure 30 with the ground. If we go 100 m in the tunnel, the vertical distance from the ground is covered x m, then .......... . x > 100 m x = 100 m x = 50 m x = 30 m

**shailesh.solanki**18th March 2018 1:43 PM