Get a free home demo of LearnNext

Available for CBSE, ICSE and State Board syllabus.
Call our LearnNext Expert on 1800 419 1234 (tollfree)
OR submit details below for a call back

clear
searchtune
What people are asking?

Asked by Rohit Jha

Jul 15, 2014

Sin 10 Sin 30 Sin 50 sin 70 = 1/16

This answer has an image. Please click on the question to read more.

Answer (5)

Asked by Umakant Biswal

Feb 21, 2015

If the sum of n terms of an a.p is 3n2 + 5n and its mth term is 164, find the value of m?

This answer has an image. Please click on the question to read more.

Answer (3)

Asked by Adithyan Sanal

May 6, 2015

Find the square root of the complex number 5 − 12i. 

Answer (2)

Asked by G Bhanuteja

Oct 9, 2014

Q. If log12 27=a, then log6 16 is 
(i) 4(3-a)/(3+a)
(ii) 4(3+a)/(3-a)
(iii) (3+a)/4(3-a)
(iv) (3-a)/4(3+a)

This answer has an image. Please click on the question to read more.

Answer (1)

Asked by Nidhi

May 14, 2014

Find the domain and range of the function f(x) = √(16-x2).

Domain:- [-4,4] Range:- [0,4]

Answer (2)

Asked by Rejitha Krishnan RG

Oct 22, 2014

if (b+c)/a,(c+a)/b,(a+b)/c are in AP, show that :
a)1/a,1/b,1/c are in AP
b)bc,ca,ab are in AP

This answer has an image. Please click on the question to read more.

Answer (1)

Asked by Simiran Mohapatra

Dec 14, 2014

How many numbers greater than a million can be formed with the digits 2,3,0,3,4,2,3.

Sol:
Here one million = 10,00,000.Given numbers are 2,3,0,3,4,2,3.

A number greater than 1000000 has 7 places,and all the digits are to be used.But 2 is repeated twice and 3 is repeated th...

Answer (1)

Asked by Nidhi

May 15, 2014

7 + 77 + 777 + .............+7777..77(n digits) = 7/81(10n+1 -9n -10)

Sol :
Let P(n) : 7+77+777+................+(7777........777) n-terms = 7/81[10n+1-9n-10], n ϵ N   
Step 1 : For n = 1 we have
P(1) = 7 = 7/81[101+1-9-1...

Answer (1)

Asked by Rejitha Krishnan RG

Oct 16, 2014

1)between 1 and 31, m numbers have been inserted in such a way that the ratio of 7 th and (m-1) th numbers is 5:9.find the value of m

2)if n arithemetic means are inserted between 20 and 80 such that the ratio of the first mean to the last mean is 1:3,then find the value of n

3)the ratio of the first to the last of n AMs between 5 and 35 is 1:4. find n.

4)show that the sum of n arithemetic means between given two numbers is n times the single AM between the two numbers

1) Terms of the A.P. are 1, A

Answer (2)

Asked by Shakti Gayatri

Jul 27, 2014

show that ,

2nCn=2^n[1.3.5........(2n-1)]/n!

Sol:
Given 2nCn =  (2n)! / n! n!

= (2n)! / (n!)2

= (2n) ( 2n - 1) (2n - 2) -----------4.3.2.1 / (n!)2

= 2x...

Answer (1)

Filters