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What are the real numbers x and y ,if (x -iy)(3+5i) is the conjugate of (-1-3i).

Posted by Mumtaz Ali 6 years, 10 months ago

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In a survey of 700 students in a college 200 went for regular entrance coaching, 295 attented only correspondence coaching, 115 attented both regular and correspondence coaching find how many got admission without any entrance coaching

Posted by Aarav Rajput 6 years, 10 months ago

CBSE > Class 11 > Mathematics

1 answers

Dolly ?️ 6 years, 10 months ago

320

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Value of tan 40°

Posted by Aastha Mittal 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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Find domain and range of f(x)=1/(4-x x)

Posted by Madhumita Kumari 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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For any two sets A and B ,prove that: P(A) =P(B)

Posted by Shubham Kamra 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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Prove that tan20°tan40°tan80°=tan60°

Posted by ?Rahul? ?Gusain? 6 years, 10 months ago

CBSE > Class 11 > Mathematics

1 answers

Gaurav Seth 6 years, 10 months ago

now, multiplying numerator and denominator by 2,

=(2*sin 40*sin 80) *sin 20 /(2 cos 40*cos 80) cos 20]

=(cos 40- cos 120)*sin 20/( (cos 120+ cos 40) cos 20

=(2 cos 40 +1) sin 20 /(2 cos 40-1) cos 20

=(2 cos 40*sin 20 +sin 20) /(2 cos 40 cos 20 -cos 20)

=(sin 60 -sin 20 +sin 20)/ (cos 60+sin 20-sin 20)

= sin 60/cos 60

=tan 60.

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Sin ^2a +cos^2a=?

Posted by Kapil Sen 6 years, 10 months ago

CBSE > Class 11 > Mathematics

1 answers

Somesh Sharma 6 years, 10 months ago

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Sin2x prove that is equal to cos2x

Posted by Mayur Rajput 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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If 3x, x+2 and 8 are three consecutive terms of an A.P. find its 4th term

Posted by Prachi Mishra 6 years, 10 months ago

CBSE > Class 11 > Mathematics

1 answers

Aditya Pandey 6 years, 10 months ago

C. D =10 a=-12 So, 4 term=a+4d =-12+40 =28

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Find the focus and directix of the parabola 2x+y2=0

Posted by Prahalad Soni 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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Find the no. of subsets of the set A=(a, b, c)

Posted by Prahalad Soni 6 years, 10 months ago

CBSE > Class 11 > Mathematics

1 answers

Veena Singh☺️? 6 years, 10 months ago

No. of subset = 2^ n where n is no. Of elements Therefore, it has 8 subset (Phi),(a) , (b) , ( c) , ( a,b) , (a,c) , ( b,c) , ( a,b,c)

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Prove that sinx +sin2x +sin3x=0

Posted by Gaurav Sarkar 6 years, 10 months ago

CBSE > Class 11 > Mathematics

1 answers

Harsh Sharma 6 years, 10 months ago

Hence proved

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Find the solution region of inequalities 2x+y>2 y-x>-1 x+2y<8 x,y>0 Also find the coordinates of vertices of region. Please answer fast.....

Posted by Priyanshu Jalap 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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In a group of 50 students 14 drink orange juice but not eat apple 30 drink orange juice and each student like at least one of them . Find (i) how many drink orange juice as well as eat apple (ii) how many eat apple but not drink orange juice

Posted by Jitisha Kalra 6 years, 10 months ago

CBSE > Class 11 > Mathematics

3 answers

Akash Choudhary Dav Gandhinagar 6 years, 10 months ago

Same question coming in my xam And i got same answer.

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Keshav Bindal 6 years, 10 months ago

By Using, n(A U B) = n(A) + n(B) - n(A intersection B) . n(A-B) = n(A) - n(A intersection B)

1Thank You

Keshav Bindal 6 years, 10 months ago

i) 30-14 = 16 . ii) Students who eat apple = 50-30+16 = 36 . Students who eat apple, but not drink juice = 36-16 = 20

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A line is such that its segment between the lines 4x+3y-21=0 and 10x+y-59=0 is bisected at (4,6). find it's equation. What is answer

Posted by Shreya Dixit 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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If sin x=3/5 where 0< x <π/4,then find cos2x

Posted by Saday Samanta 5 years, 9 months ago

CBSE > Class 11 > Mathematics

2 answers

Keshav Bindal 6 years, 10 months ago

Cos2x = 1-2Sin square x = 1- 2(3/5)^2 = 1- 18/25 = 7/25

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Akash Choudhary Dav Gandhinagar 6 years, 10 months ago

Are ye que mera xam m aaya tha aaj My answer was 7 / 25

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Supplimentry part class 11,compler number

Posted by Jacky Choudhary 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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Write the coordinates of the point of intersect of the parabola y^2=4ax and its la tus rectum

Posted by Parth Thacker 6 years, 10 months ago

CBSE > Class 11 > Mathematics

1 answers

Shatayu Ganvir 6 years, 10 months ago

(A,2A) an ( -A,2A)

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Find the value of Sin 18° and Sin 36°

Posted by Satyam Barnwal 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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domain and range of f(x)=1/(1-(x^2))

Posted by Muskan Saini 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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If cos theta=cosA.cosB then prove that tan(theta+A/2).tan(theta-A/2)=tan^2(B/2)

Posted by Himika Jain 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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How to find cumulative frequency ins stats

Posted by Chelsi Mewara 6 years, 10 months ago

CBSE > Class 11 > Mathematics

2 answers

Ishan Singh 6 years, 10 months ago

Ex f=4 6 7 2 5 Cf =4+6+7+2+5

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Ishan Singh 6 years, 10 months ago

Cf is sum of previous frequency

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Subset

Posted by Sanjay Gangrade 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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any one have previous years maths ques pprs

Posted by Sahil Goria 6 years, 10 months ago

CBSE > Class 11 > Mathematics

1 answers

Abhinav Agarwal 6 years, 10 months ago

Available in this app

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Prove that tan20°+tan40°+tan80°=tan60°

Posted by ?Rahul? ?Gusain? 6 years, 10 months ago

CBSE > Class 11 > Mathematics

1 answers

Abhinav Agarwal 6 years, 10 months ago

Convert into sin and cos and then solve

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2017 and 2018 paper

Posted by Ishan Kumar 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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Find the n term of series: 3+7+13+21+31+.........+n

Posted by Adarsh Thakur 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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Graph of 3 lines

Posted by Manu Sharma 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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Find the multiplicative inverse of 4-√-9

Posted by Biju Biju 6 years, 10 months ago

CBSE > Class 11 > Mathematics

3 answers

Dolly ?️ 6 years, 10 months ago

4/root(16+9)-3i/root(16+9) =4/25-3i/25 =(4-3i)/25

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Adarsh Thakur 6 years, 10 months ago

Firstly u take reciprocal of this value then rationalise the answers is in the form of a+ib

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Shatayu Ganvir 6 years, 10 months ago

Do reciprocol and rationalise it

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Find the sum to n terms of the A.P. whose k^th term is 5k+1

Posted by Neelam Sharma 6 years, 10 months ago

CBSE > Class 11 > Mathematics

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