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Arvind asked a question
Subject: Maths, asked on on 25/6/16
If cos-1 x - cos-1 y/2 = ​alpha, then 4x2 - 4xy cos alpha + y2 = ?
(a) 4 (b) 2sin2 alpha
(c) -4sin2 alpha (d) 4sin2 alpha
Prawin Kumar asked a question
Subject: Maths, asked on on 25/5/16
In Traiangle ABC if b2+c2=3a2. Then cotB+cotC-cotA equals to
1. 1
2. ab/4 delta
3. 0
4. ac/4 delta
Ans and explanation
Manideep Varma asked a question
Subject: Maths, asked on on 24/6/16
no of circles touching all the lines x-2y+1=0,2x+y+3=0 and 4x-8y+3=0 is
Rishabh Shakya asked a question
Subject: Maths, asked on on 10/5/16

ABCD is a trapezium such that AB and CD are parallel and BC⊥CD. If ∠ADB = θ, BC = p and CD = q, then AB is equal to :

Options

A)

B)

C)

D)
Karan Thobhani asked a question
Subject: Maths, asked on on 25/11/16
If in a triangle ABC, two sides are a = 3, b = 5 and cos(A - B) = 7/25, find tan C/2.
Arvind asked a question
Subject: Maths, asked on on 25/6/16
If H is orthocentre of triangle ABC, then AH is ?
(a) b cot A (b) c cot A
(c) a cot A (d) a cot B
Manideep Varma asked a question
Subject: Maths, asked on on 9/12/16
let b and c be non collinear vectors if a is a vector such that a.(b+c)=4 and a X (bXc)=(x^2-2x+6)b+ sin y.c , then (x,y) lies on the line
Karan Thobhani asked a question
Subject: Maths, asked on on 25/11/16
Prove that in triangle ABC, the median through A divides the angle A into two parts whose cotangents are 2cotA + cotC and 2cotA + cot B and it makes an angle with the side BC whose cotangent is 1/2 (cotB - cotC).
Rashmika B asked a question
Subject: Maths, asked on on 5/5/17
prove that acosA+bcosB+ccosC<=s
Arvind asked a question
Subject: Maths, asked on on 31/12/16
For a regular hexagon, let r and R be the radii of the inscribed and circumscribed circles. A false statement among following is:
a) There is a regular polygon with r/R=1/2,
b) There is regular polygon with r/R=1/rt2,
c) There is regular polygon with r/R=2/3,
d) There is regular polygon with r/R=rt3/2.
Karan Thobhani asked a question
Subject: Maths, asked on on 25/11/16
Given a = 6, b = 8, c = 10. Find
(a) sinA  ​(b) tanA  ​(c) sinA  ​(d) cosA  ​(e) tanA
                                       2             2             2
Manideep Varma asked a question
Subject: Maths, asked on on 15/12/16
if two cards are drawn from a well shuffled pack , then the probability that atleast one of the two is heart is
Prahalad.v.rao asked a question
Subject: Maths, asked on on 16/10/16
If in a triangle ABC, cos A + cos B + cos C= 3/2 .Prove that triangle ABC is an equilateral triangle . 
Suroj Dey asked a question
Subject: Maths, asked on on 11/10/16
In a triangle ABC,the altitudes from B and C on to the opposite sides are not shorter than their respective opposite sides, then one of the angles of ABS is- 
Kalyan asked a question
Subject: Maths, asked on on 10/5/16
if 1 side of triangle is 4 cm and other side of triangle is 3 cm and the angle is 30 degfor 1 triangle for second triangle Lleis 120 degand it is not right angled tringleand for both triangles sides are same
Krishna Vamsi asked a question
Subject: Maths, asked on on 13/9/16
one of the lines of 3x2+4xy+y2=0 is perpendicular to Lx+y+4=0 then L=?
Krishna Vamsi asked a question
Subject: Maths, asked on on 7/12/16
the rate of change of sine is n then the rate of change of tangent is?
Suroj Dey asked a question
Subject: Maths, asked on on 11/10/16
In a triangle ABC, AB=AC=37 cm . Let D be a point on BC such that BD=7cm, AD= 33c,. Then find CD
Rishabh Shakya asked a question
Subject: Maths, asked on on 10/5/16

In ΔABC,andattains its maximum possible, then the equation whose are rootsandis

Options

A)

B)

C)

D)
Mohammed Adil Ibrahim asked a question
Subject: Maths, asked on on 21/11/16
if G is the centroid of the triangle ABC show that cot GAB+cot GBC+cot GCA= 3cot omega= cot ABG+cotBCG+cotCAG where cot omega=cot A+cot B+cot C
Karan Thobhani asked a question
Subject: Maths, asked on on 25/11/16
In any triangle, prove that - a cosA + b cosB + c cosC​ = r/R
​​                                                         a + b + c
Harsh Sharma asked a question
Subject: Maths, asked on on 12/5/16
the sides of a triangleare three consecutive natural numbers and its largest angle is twice the smallest one . determine the sides of the triangle ?
plzzzansfast
Manideep Varma asked a question
Subject: Maths, asked on on 24/6/16
the tangent at any point to the circle x^2+y^2+4x-6y-12=0 to the circle x^2+y^2+4x-6y+4=0 is
Subhendu Gorai asked a question
Subject: Maths, asked on on 13/1/17
How get this line
Rishabh Shakya asked a question
Subject: Maths, asked on on 9/5/16
Let the semi-perimeter of a triangle bes. Then, the maximum area of the triangle is
  • A)

  • B)

  • C)

  • D)

Mohammed Adil Ibrahim asked a question
Subject: Maths, asked on on 21/11/16

if abc is a triangle having a right angle at C and AE, BD are drawn perpendicularly to AB meet BC and AC produced in E and D respectively then prove that tan CED =tan^3 bac
Mohammed Adil Ibrahim asked a question
Subject: Maths, asked on on 21/11/16
if the bisectors of angles B,C in triangle ABC meet opposite sides in E,F then prove that EF makes with BC an angle of tan ^-1 ((b-c)sin A/(a+b)cos C +( a+c) cos B)
Karan Thobhani asked a question
Subject: Maths, asked on on 25/11/16
​Find r .
Guna Shekar asked a question
Subject: Maths, asked on on 12/5/16
In the 2nd question of class test of Solutions of Triangles: II(JEE Live), please give me the detailed simplification of the 1st,2nd and 3rd steps whose picture is attached below
Varsha Tiwari asked a question
Subject: Maths, asked on on 7/10/17
28. Prove that angles opposite to equal sides are equal.
Guna Shekar asked a question
Subject: Maths, asked on on 19/10/17
Solve this :


59. The most general solution of the equation                8 tan2 θ2=1+sec θ, is(a) θ=2n π±cos-1 13                  (b) θ=2n π±π6(c) θ=2n π±cos-1-13                  (d) None of these
Varun Gupta asked a question
Subject: Maths, asked on on 17/7/17
Derive the formula of a cyclic quadrilateral i.e. rt [s(s-a)(s-b)(s-c)(s-d)], with appropiate use of multimedia
Rishabh Shakya asked a question
Subject: Maths, asked on on 9/5/16

Let the angles A, B and C of ΔABC be in A.P and.

Find the measure of angle C.

  • A)

    30°

  • B)

    45°

  • C)

    60°

  • D)

    90°
Manideep Varma asked a question
Subject: Maths, asked on on 6/12/16
a(1,2,3)b(3,1,-1) are two points. the length of projection of ab on a line having d.r s
Rishabh Shakya asked a question
Subject: Maths, asked on on 9/5/16

Options

A)

B)

C)

D)

None of these
Swapnil Soni asked a question
Subject: Maths, asked on on 14/7/16
The sides of atriangle are in Arithmetic Progression (A.P.). If the smallest angle of the triangle is α and largest angle of the triangle exceeds smallest angle by β , then what is the perimeter of the triangles.​
Hridesh asked a question
Subject: Maths, asked on on 3/6/17
Sir are we supposed to remember the derivation of the laws?
Manideep Varma asked a question
Subject: Maths, asked on on 21/11/16
the locus of centres of all the circles passing through(1,2) and cutting x^2+y^2=16 orthogonally?
Tanishka Gupta asked a question
Subject: Maths, asked on on 28/5/18
Solve question 10
Mohammed Adil Ibrahim asked a question
Subject: Maths, asked on on 21/11/16
p is a point in the plane of triangle ABC and L,M,N are the feet of the perpendiculars from P on to the sides of the triangle then prove that if the value of MN+NL+LM is constant and equal to l the least value of of PA^2+PB^2+PC^2 is l^2/sin ^2A+sin ^2B + sin ^2C
Swapnil Soni asked a question
Subject: Maths, asked on on 14/7/16
The sides of atriangle are in Arithmetic Progression (A.P.). If the smallest angle of the triangle is α and largest angle of the triangle exceeds smallest angle by β , then what is value of tan[α + (β/2)] ?
Rishabh Shakya asked a question
Subject: Maths, asked on on 10/5/16

In ΔABC,andattains its maximum possible, then the equation whose are rootsandis

  • A)

  • B)

  • C)

  • D)

Pankaj Mandrawal asked a question
Subject: Maths, asked on on 13/10/16
2n-3+4(n-1)=1-(n+1+2n-2)2 find n
Pankaj Mandrawal asked a question
Subject: Maths, asked on on 13/10/16
2n-3/4(n-1)=1-(n+1/2n-2)2 find n
Manideep Varma asked a question
Subject: Maths, asked on on 6/12/16
if the line joining the points (-1,2,3)(2,-1,4) is perpendicular to the line joining (x,-2,4) and then x=
Rishabh Shakya asked a question
Subject: Maths, asked on on 9/5/16

LetPQRbe a triangle of areawithand, wherea,bandcare the lengths of the sides of the triangle opposite to the angles atP,QandRrespectively. Thenequals

  • A)

  • B)

  • C)

  • D)

Rishabh Shakya asked a question
Subject: Maths, asked on on 9/5/16

In ΔABC,andattains its maximum possible, then the equation whose are rootsandis

Options

A)

B)

C)

D)
Manideep Varma asked a question
Subject: Maths, asked on on 9/12/16
a tetrahedron has vertical at O(0,0) A(1,2,1) B(2,1,3) C(-1,1,2) then the angle between the faces OAB and ABC is?
S.akash asked a question
Subject: Maths, asked on on 24/11/17
What is Vedic Maths?
Krishna Vamsi asked a question
Subject: Maths, asked on on 8/7/16
if sin alpha+sin beta=a and cos alpha+cos beta=b then
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