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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.

Umakant Biswal

Feb 21, 2015

If the sum of n terms of an a.p is 3n^{2} + 5n and its m^{th }term is 164, find the value of m?

Given:

Sum of n terms in AP Sn = 3n^{2}

Sum of n terms in AP Sn = 3n

Adithyan Sanal

May 6, 2015

Find the square root of the complex number 5 âˆ’ 12i.

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

G Bhanuteja

Oct 9, 2014

Q. If log_{12} 27=a, then log_{6 }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)

(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.

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.

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

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

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.

Nidhi

May 14, 2014

Find the domain and range of the function f(x) = âˆš(16-x^{2}).

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

Nidhi

May 15, 2014

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

Sol :

Let P(n) : 7+77+777+................+(7777........777) n-terms = 7/81[10^{n+1}-9n-10], n Ïµ N

Step 1 : For n = 1 we have

P(1) = 7 = 7/81[10^{1+1}-9-1...

Let P(n) : 7+77+777+................+(7777........777) n-terms = 7/81[10

Step 1 : For n = 1 we have

P(1) = 7 = 7/81[10

Shakti Gayatri

Jul 27, 2014

show that ,

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

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

Sol:

Given ^{2n}C_{n }= (2n)! / n! n!

= (2n)! / (n!)^{2}

= (2n) ( 2n - 1) (2n - 2) -----------4.3.2.1 / (n!)^{2}

= 2x...

Himanshu

Jul 20, 2013

find the range of the following function

- f(x)= 3sinx + 4cosx - 5

Let y = 3 sin x + 4 cos x - 5.

â‡’ (y+5) = 3 sin x + 4 cos x

If the function is of the form ( a sin x + b cos x ) for all real ...

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.

Umakant Biswal

Feb 21, 2015

If the sum of n terms of an a.p is 3n^{2} + 5n and its m^{th }term is 164, find the value of m?

Given:

Sum of n terms in AP Sn = 3n^{2}

Sum of n terms in AP Sn = 3n

Adithyan Sanal

May 6, 2015

Find the square root of the complex number 5 âˆ’ 12i.

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

G Bhanuteja

Oct 9, 2014

Q. If log_{12} 27=a, then log_{6 }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)

(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.

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.

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

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

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.

Nidhi

May 14, 2014

Find the domain and range of the function f(x) = âˆš(16-x^{2}).

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

Nidhi

May 15, 2014

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

Sol :

Let P(n) : 7+77+777+................+(7777........777) n-terms = 7/81[10^{n+1}-9n-10], n Ïµ N

Step 1 : For n = 1 we have

P(1) = 7 = 7/81[10^{1+1}-9-1...

Let P(n) : 7+77+777+................+(7777........777) n-terms = 7/81[10

Step 1 : For n = 1 we have

P(1) = 7 = 7/81[10

Shakti Gayatri

Jul 27, 2014

show that ,

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

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

Sol:

Given ^{2n}C_{n }= (2n)! / n! n!

= (2n)! / (n!)^{2}

= (2n) ( 2n - 1) (2n - 2) -----------4.3.2.1 / (n!)^{2}

= 2x...

Himanshu

Jul 20, 2013

find the range of the following function

- f(x)= 3sinx + 4cosx - 5

Let y = 3 sin x + 4 cos x - 5.

â‡’ (y+5) = 3 sin x + 4 cos x

If the function is of the form ( a sin x + b cos x ) for all real ...