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

Let three terms of a.p be a/r,a,ar AtoQ a/r+a+ar=39/10 eq.1 Also a/r.a.ar=1 a^3=1 a=1 Now put this value of a in eq.1,we get 1/r+1+r=39/10 1+r+r^2/r=39/10 10+10r+10r^2=39r 10^2r+10r-39r+10=0 10^2r-29r+10r=0 10^2r-25r-4r+10=0 5r(2r-5)-2(2r-5)=0 (5r-2)(2r-5) r=2/5or5/2

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Sum of first 4 terms in an A.P. Is 58 and sum of last 4 terms is 112. First term is 11. Find the nth term

Posted by Akhilesh Gupta 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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Prove that (cos 18 - sin 18) = root 2 sin 27

Posted by Prahallad Patel 7 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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Solve this equestion:- (√3-1)cosx+(√3+1)sinx=2

Posted by Dheeraj Kashyap 7 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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Bhai log sa1sa1 me maths me 68/100kya marks aacha h ????? I confused

Posted by Akash Choudhary Dav Gandhinagar 7 years, 3 months ago

CBSE > Class 11 > Mathematics

3 answers

Rajat Vashisth 7 years, 2 months ago

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Akash Choudhary Dav Gandhinagar 7 years, 3 months ago

Tumhara kitna

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Priya Dharshini ☺☺ 7 years, 3 months ago

Good not bad if u improve little bit it is easy to reach 80% all the best for next exam

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The 10th term of a.p.is41and18th term is 73. Find a.p

Posted by Sanjay Singh 7 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Chesta Pawan Manchanda 7 years, 3 months ago

a10=a+9d----------(1) a18=a+17d---------(2) From equation 1 and 2 we get d=4 Putting the value of d in equation (1) We get a=5 And AP will be 5;9;13 and so on

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Sanjay Singh 7 years, 3 months ago

5,9,13,17

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Lim x--pie/2 tan2x÷x-pie/2.

Posted by Shivshant Upadhyay 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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Why the value of 0! Is 1 reason

Posted by Umang Dadhich 7 years, 3 months ago

CBSE > Class 11 > Mathematics

3 answers

Priya Dharshini ☺☺ 7 years, 3 months ago

This still counts as one way of arranging it, so by definition, a zero factorial is equal to one, just as 1! is equal to one because there is only a single possible arrangement of this data set.

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Shivshant Upadhyay 7 years, 3 months ago

2!=2 (1×2) and 3!=3(1×2×3)

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Shivshant Upadhyay 7 years, 3 months ago

As 1!=1 2!=2 3! =3 and so on. By this we can say that 0!=1.

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Value of factorial 0

Posted by Umang Dadhich 7 years, 3 months ago

CBSE > Class 11 > Mathematics

4 answers

Priya Dharshini ☺☺ 7 years, 3 months ago

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Aman Kumar 7 years, 3 months ago

The value is 1...?

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Shivshant Upadhyay 7 years, 3 months ago

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Arpita Mishra 7 years, 3 months ago

Value of 0 factorial is 1

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What is argument and polar representation..explain with example

Posted by Siba Prasad 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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Find doman and range of equation 1/x+3

Posted by Ashutosh Mi 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Rahul Lamba 7 years, 3 months ago

Domain=Any real number accept(-3) Range = Real number

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Find the equations of the altitudes of a triangle ABC whose vertices are A(1,4),B(-3,2) and C(-5,-3).

Posted by Ashwin Nair 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Xyz Abc 7 years, 3 months ago

First find the slope of base .with the help of this slope find the slope of altitude .since one on the altitude is already given i.e vertex a, u can easily find the eq. Of altitude using y-y'=m(x-x')

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In any triangle ABC, prove that a sin(B-C) +b sin(C-A) +c sin(A-B)=0

Posted by Ashish Katiyar 7 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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The equation to the circle whose radius is4 and which touches the negative x axis at a distance 3 unit from the origin

Posted by Khushi Ranparia 7 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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which one is greater 44.65 or 44.650?Why?

Posted by Rinku Verma 7 years, 3 months ago

CBSE > Class 11 > Mathematics

4 answers

Aradhya Agarwal 7 years, 3 months ago

Equal hae dono

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Ujjwal Tiwari 7 years, 3 months ago

both are equal

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Abhishek Rai 7 years, 3 months ago

44.65

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Akshay Khose 7 years, 3 months ago

Mathematically, both are equal because 0 after decimal at the end can be neglected. Logically, 44.65 can be equal or slighty greater than 44.650 only if there is case that 44.65 is rounded to two digits after decimal as digits from 1 to 4 can be neglected after decimal. Thus there is not finite answer if we see logically, but one can discuss over this topic for entertainment.

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Evaluate : lim. Tanx-sinx/sin cube x Xtends to 0

Posted by Amrit Kaur 7 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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Convert 240 degree into radian

Posted by Shashank Shashank 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Luna Crystal 7 years, 3 months ago

240×(π/180)=240π/180=4π/3 radian

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If tan A = 5/6 and tan B = 1/11 then find the value of (A + B)

Posted by Tejas Shinde 7 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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Find square root of following iota

Posted by Bhawesh Joshi 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Amrit Kaur 7 years, 3 months ago

i^2=-1

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A= {1,2,3,4,5},How many binary operations are there such that 3 as an identity element

Posted by Sudheesh Sir 7 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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Zdhzgjzfjxhljgfuldluiyipdtifluskyfhkgf

Posted by Aayush Kaushal 5 years, 9 months ago

CBSE > Class 11 > Mathematics

4 answers

Jyoti Prajapati 7 years, 3 months ago

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Rikku Mahto 7 years, 3 months ago

Kya aabri baabri shaabri

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Priya Dharshini ☺☺ 7 years, 3 months ago

Ask proper question

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Devendra 10 7 years, 3 months ago

????

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tan69 + tan66 + 1= tan69.tan66

Posted by Abhishek Rai 7 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Luna Crystal 7 years, 3 months ago

=>We know that, tan(135)=tan(180-45)= -tan45= -1 =>So, tan(135)=-1 =>tan(66+69)= -1 => (tan66+tan69)/(1-tan66.tan69)=-1 => tan66+tan69= -1+tan66.tan69 =>tan66+tan69+1=tan69.tan66...Hence, proved.

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Saurav Kumar 7 years, 3 months ago

We know that tan(69+66)=tan69 + tan 66/1-tan69.tan66 Taking rhs, Tan69 + tan66=1 -tan69.tan66 1-tan69-tan66=tan69.tan66 Vo kabhi proof nhi hoga

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54213*5242255

Posted by Prince Pal 7 years, 3 months ago

CBSE > Class 11 > Mathematics