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Akash Singh 6 years, 10 months ago

5050

ANSWER

If the value of sin theta / sec theta + tan theta - 1 + cos theta/ cosec theta + cot theta -1

Posted by Vishal Thakur 6 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Prove that the sum of the squares of the diagonals of a parallelogram is equal to the sum of the squares of it's sides

Posted by Pavitra Narayanan 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Kiara D'Cruz 6 years, 10 months ago

This is ncert problem man find the solution in this app

ANSWER

A copper rod of diameter 1cm and length8cm is drawn into a wire of length 18cm of uniform thickness. Find the thickness of the wire

Posted by Shivani Kumari 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Kiara D'Cruz 6 years, 10 months ago

Equate the volume of wire and rod

ANSWER

If x=3 is one root of the quadratic equation x²-2kx-6=0, then find the value of k.

Posted by Yash Sencha 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Affu 😊 6 years, 10 months ago

I/2

Sushil Kumar 6 years, 10 months ago

9-6k-6=0 3-6k=0 -6k=-3 K=1/2

ANSWER

The lengthsside of the diagonals of a rhombus are 30cm and 40cm Findin the sideof of theof rhombus

Posted by Venkat Narayana 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Pavitra Narayanan 6 years, 10 months ago

Answer is 25 cm by Pythagoras theorem

ANSWER

Given that 1+sinΦ+cosΦ=1 Then prove that 2sinΦ-cosΦ=2

Posted by Nisha Gulati 6 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

In an equilateral triangle ABC, D is a point on side BC such that BD=1/3 BC. Prove that 9AD square = 7AB square

Posted by Ashutosh Mishra 6 years, 10 months ago

CBSE > Class 10 > Mathematics

4 answers

✨Raagini ?? 6 years, 10 months ago

ABC is an equilateral triangle , where D point on side BC in such a way that BD = BC/3 . Let E is the point on side BC in such a way that AE⊥BC . Now, ∆ABE and ∆AEC ∠AEB = ∠ACE = 90° AE is common side of both triangles , AB = AC [ all sides of equilateral triangle are equal ] From R - H - S congruence rule , ∆ABE ≡ ∆ACE ∴ BE = EC = BC/2 Now, from Pythagoras theorem , ∆ADE is right angle triangle ∴ AD² = AE² + DE² ------(1) ∆ABE is also a right angle triangle ∴ AB² = BE² + AE² ------(2) From equation (1) and (2) AB² - AD² = BE² - DE² = (BC/2)² - (BE - BD)² = BC²/4 - {(BC/2) - (BC/3)}² = BC²/4 - (BC/6)² = BC²/4 - BC²/36 = 8BC²/36 = 2BC²/9 ∵AB = BC = CA So, AB² = AD² + 2AB²/9 9AB² - 2AB² = 9AD² Hence, 9AD² = 7AB² ????

Shruti Gupta 6 years, 10 months ago

Search it in rs agarwal examples it is given their

Sneha Singh?????? 6 years, 10 months ago

U can check it on this appp it's given in ncert solutions

Sneha Singh?????? 6 years, 10 months ago

It's tooo long

ANSWER

tanA=CotB ,prove that A+B =90

Posted by Akshay Jamwal 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Affu 😊 6 years, 10 months ago

TanA= CotB , TanA= Tan(90-B) , A=90-B , A+B=90

Sneha Singh?????? 6 years, 10 months ago

Tan A = tan ( 90-B ). = A = 90- B ......... = A+ B = 90

ANSWER

tanA = cot B

Posted by Akshay Jamwal 6 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Ahmad Farooqui 6 years, 10 months ago

Then A+B=90

Yukti Arora 6 years, 10 months ago

There is something missing..plz check it again

Kiara D'Cruz 6 years, 10 months ago

Incomplete question

ANSWER

An aeroplane is flying at a height of 3000m . An observer finds his angle of elevation to be 60° and after 6 sec it changes to 45°. What is the speed of aeroplane?

Posted by Aditya Mahapatra 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Yukti Arora 6 years, 10 months ago

Ncert ques ch 6 ex 6.5 .....go for ncert solutions

Armandeep Singh 6 years, 10 months ago

firstly draw AB by supposing its height =3000m then mark 2 angles of elevation 45 degree then 60 degree behind that . Then apply trignometric identities we will get the answer

3Thank You

ANSWER

If alpha and beta are the zeroes of quadratic polynomial:p(x)-3xsquare-4x+1 find a quadratic polynomial whose zeroes are alphasquare/beta and betasquare/alpha

Posted by Saniya Kothari 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Ansh Jain 6 years, 10 months ago

K( x square -100/3x-1/3)

ANSWER

Pls send me pythagores theorm

Posted by Dheeraj Choudhary 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Armandeep Singh 6 years, 10 months ago

square of hypotenuese is equal to the sum of square of its base and perpendicular

ANSWER

Some importent tips for remember wile doing paper

Posted by Sakshi Khare 6 years, 10 months ago

CBSE > Class 10 > Mathematics

5 answers

Sarvika Bhan 6 years, 10 months ago

Ensure that you have enough rough work space........and do rough work calculations neatly to avoid calculation errors (silly mistakes)

Steven Rogers 6 years, 10 months ago

Don't use black pens during examination Its good to write the whole paper using only one pen

Siddhartha Jain 6 years, 10 months ago

If possible then do solutions in series

4Thank You

Kiara D'Cruz 6 years, 10 months ago

Be fully prepared and calm during the exam

4Thank You

Siddhartha Jain 6 years, 10 months ago

Don't use whitner

6Thank You

ANSWER

An aeroplane is flying at a height of 300 m. An observer finds his angle of elevation to be 60° and after 6 seconds it changes to 45°.what is the speed of aeroplane

Posted by Lucky Singh 6 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Any expecred question for cbse maths 2018

Posted by Devanshi Saini 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Mayank ... 6 years, 10 months ago

Rs aggarwal ka saara example questions padh lo..... I guarantee you will score 70 marks... But when if you get it by your heart...

ANSWER

If ? ABC similar to ? PQR, ar(? ABC):ar(? PQR) =9:4,AB=18cm and BC=15cm,then find the value of QR

Posted by Pal Kamboj 5 years, 8 months ago

CBSE > Class 10 > Mathematics

5 answers

Pal Kamboj 6 years, 10 months ago

10 cm

Mehak Rathore 6 years, 10 months ago

In this we have used thereom the ratio of ares of 2 similar is equal to the square of there corresponding side

Mehak Rathore 6 years, 10 months ago

Ar?ABC\Ar?PQR = 9/4 9/4=(15^2/x^2) 9*225=4*x^2 2025= 4*x^2 2025/4=x^2 506.25=x^2 22.5=x So QR =22.5

Harsha Asiwal 6 years, 10 months ago

Qr is 10

Puja Sahoo? 6 years, 10 months ago

10cm

3Thank You

ANSWER

Irrational number proof

Posted by Ghayas Uddin 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Siddhartha Jain 6 years, 10 months ago

Assume kro ki wo no. rational h aur us no. Ko 2 composite no. Ka factor proof kr do wo irrational ho jaega

ANSWER

A moveing boat is observed from top of a 150 high cliff moveing away from the clif the angle of depression of the boat changes from 60 °to 45 degree in 2 minutes find speed of boat in m/h

Posted by Akah I Jacob 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Danush Senthil Kumar 6 years, 10 months ago

ans:2(3-root3)/3 km/h

ANSWER

If the pth term of AP is q and qth term is p.Then show that its nth is ( p+q-n).

Posted by Friend Anjali Bisht 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Puja Sahoo? 6 years, 10 months ago

ap= a+(q-1)d.......(i) and aq=a+(p-1)d.....(ii) now, solve eq. i and ii yu will get, d=-1..... substitute the value in i or ii yu will get a=p+q-1..... now an=a+(n-1)d... put values of a and d

ANSWER

The angle of elevation of the top of a vertical Tower from a point on the ground is 60 degree . From the another point 10m vertically above the first, its angle of elevation is 30 degree. find the height of the tower. Plzz solve it

Posted by Vivek Joshi 6 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Ansh Jain 6 years, 10 months ago

Vivek Joshi 6 years, 10 months ago

10m is what

Siddhartha Jain 6 years, 10 months ago

Height of tower = 10+10√3/√3

ANSWER

If a line is drawn parallel to one side of a triangle to intersect other two sides in distinct points, the other two sides are divided in the same ratio

Posted by Anmol Attri 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Mehak Rathore 6 years, 10 months ago

It is bpt on pg no 126 theorem6. 2

ANSWER

Find the ratio in which p( 4, m) divide the line segment joining a point A(2,3)and b (6,-3)and find m

Posted by Paras Chauhan 6 years, 10 months ago

CBSE > Class 10 > Mathematics

7 answers

Friend Anjali Bisht 6 years, 10 months ago

Applying section formula (m1x2+m2x1/m1+m2,m1y2+m2y1/m1+n2) P=(4,m) A=(2,3) B=(6,-3) Let the ratio =k:1 P(4,m)=k(6)+1(2)/k+1,k(-3)+1(3)/k+1 Now,A.T.Q 4=6k+2/k+1 4(k+1)=6k+2 4k+4=6k+2 4-2=6k-4k 2/2=k 1=k Put the valu of k m=1(-3)+1(3)/1+1 m=-3+3/2 m=0/2 m=0 Tharefore the value of m = 0?

Vishnu Singh 6 years, 10 months ago

M=0 and ration will be 1:1 use section formula

Siddhartha Jain 6 years, 10 months ago

Ya m=0

Siddhartha Jain 6 years, 10 months ago

I mean ratio is 1:1