CBSE > Class 11 > Mathematics | CBSE Board | Homework Help

As there must be 8 chairs . So , ways that the btother sit together = 6! + 2! . Total no ways boys can sit = 8! Ways that bros shouldnt sit together = 8! -(6!+2!)

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Aman Kumar 7 years, 3 months ago

This is from permutations and combination chapter.... na!!

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Given- cos(a°)=1/3. Find a°

Posted by Sonalika . 7 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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What is the number of proper subsets in a set containing n elements

Posted by Abhishek Sarawat 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Kajal Binjola 7 years, 3 months ago

2*n

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Find all pairs of consecutive even positive integers both of which are larger than 5 such that their sum is less than 23

Posted by Himanshu Arya 7 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Keshav Bindal 7 years, 3 months ago

?In ans. also (10,12)

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Jatin Jain 7 years, 3 months ago

Let the no.s be x,( x+2) Given that:- x>5---------------(1) x+(x+2)<23 =》2x+2<23 =》2x <23-2 =》x <21÷2 =》x <10.5------------(2) by (1), (2) 5 >x>10.5 =》x €{6,7,8,9,10} Therfore, the pairs are (6,8), (8,10)

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(Mod x -1)/(1-mod x)over root

Posted by Aditya Raj 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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Given : (sin a sin b) - (cos a cos b + 1) = 0 Find 1 + (cot a tan b)

Posted by Aditya Surendran 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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(K+1)all cube = ?

Posted by Silenttutor ... 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Nisha Pahadwa 7 years, 3 months ago

(K+1)³ By using identity a³+3a²b+3ab²+b³ (K)³+3(k)²1+3k(1)²+(1)³ K³+3k²+3k+1

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Class 9 histry of 12 chapter

Posted by Jagdish Kourav 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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What is difference between permutations and combination

Posted by Balram Kushvaha 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Disha Garg 7 years, 3 months ago

Permutation is used when we have to place samething and combination when have to choose

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What is value of tanα = -1?

Posted by Rajveer Kaur 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Keshav Bindal 7 years, 3 months ago

tan a = - tan (π/4)° => tan a = tan (π-π/4) => a = 3π/4

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If A is subset of B then is A=B

Posted by Riya Gupta 7 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Keshav Bindal 7 years, 3 months ago

No,....if A is subset of B...and...B is subset of A.......then A=B

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Sonali Aggarwal 7 years, 3 months ago

If A is subset of B then A is less than or equal to B since B may or may not contain more elements than A

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tomorrow is my maths exam I can't understand ch sequence and series and permutations an combination and trigo

Posted by Additri M 7 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Rohin Jaswal 7 years, 3 months ago

You are going to YouTube and you are easy prepared test

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Aman Kumar 7 years, 3 months ago

It's all are important chapter, just do work hard other wise u will get less marks.

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Lim h tends to 0 [ 1/h{6+h/3+2h - 2} ]

Posted by Nilam Kumari 7 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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Find the square root of 3+i4

Posted by Amarjit Ngangbam 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Rinki Dabas 7 years, 3 months ago

Let x+iy squaring on both sides to apply identity (a+b)square or compare real and imaginary part in both side or apply formula xsquare+ ysquare ka holesquare =xsquare-ysquare ka holesquare +2xy ka holesquare or put the value or step product ofx and y

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Cos theta =sin105*+cos105*

Posted by Sumit Kumar 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Keshav Bindal 7 years, 3 months ago

RHS = sin(90+15) + cos(90+15) = sin90.cos15 + cos90.sin15 + cos90.cos15 - sin90.sin15 = cos15 + 0 + 0 - sin15 = cos(45-30) - sin(45-30) = cos45.cos30 + sin45.sin30 - sin45.cos30 + cos45.sin30 = √3/2√2 + 1/2√2 - √3/2√2 + 1/2√2 = 1/√2 = cos 45° therefore theta = 45

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Sinea/cosa

Posted by Lomeshwar Kumar 7 years, 3 months ago

CBSE > Class 11 > Mathematics

5 answers

Rohin Jaswal 7 years, 3 months ago

Tan a

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Aashu Sheikh 7 years, 3 months ago

Tan a

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Anubhuti Khatri 7 years, 3 months ago

Tan a

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Rinki Dabas 7 years, 3 months ago

Tana

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Manika Gupta 7 years, 3 months ago

tana

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2×sin×x÷n=?

Posted by Priyanshu Singh 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Priyanshu Singh 6 years, 9 months ago

Six

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If tan =a/a+1 and tanB =a/2a+1 then find the value of A+B

Posted by Sachin Prasad 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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Value of 0!

Posted by Umang Dadhich 7 years, 3 months ago

CBSE > Class 11 > Mathematics

4 answers

Rohin Jaswal 7 years, 3 months ago

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Keshav Bindal 7 years, 3 months ago

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Anu 16336 7 years, 3 months ago

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Sajid Ali 7 years, 3 months ago

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Prove that 1+1=3

Posted by Jha Ayush 7 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Aman Kumar 7 years, 3 months ago

Self question and self answer...

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Jha Ayush 7 years, 3 months ago

2+2=4 2+2=4+5-5 =(√4-5) ^2+5 =-(-1) ^2+5 =1+5 2+2=6 1+1=3

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How to find the Domain and Range of a given equation.

Posted by Lakshit Jain 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Anubhuti Khatri 7 years, 3 months ago

There will be two variables ,let x and y if you put some value in x and y it will be your domain and the value that u will get after solving it that will be your range

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How to find general solution and principal solutions ?

Posted by Anubhuti Khatri 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Tarun Negi 7 years, 3 months ago

for general solution you have to find value of tantheta =imaginary ÷real

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Fractional function and rational function are same or not ? Why ?

Posted by Anubhuti Khatri 7 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Ankit Aryan Shivan 7 years, 3 months ago

Form not forn

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Ankit Aryan Shivan 7 years, 3 months ago

No,it is not same because fractional funcation is in the forn of f(x)=x-[x] and also denoted by f(x) ={x} i.e (x)=x-[x]. And rational function is the form of f(x)=g(x)/h(x) or y=g(x)/h(x) where g(x)and h(x)are function of x.

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A union b (a union c)=

Posted by Arun Pandey 7 years, 3 months ago

CBSE > Class 11 > Mathematics