CBSE > Class 12 > Mathematics | CBSE Board | Homework Help

No, ncert is not enough. If you look at previous years questions, you find that questions which are not in ncert. So for better score also solve questions of other books with ncert.

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Pandey Jee 3 years, 8 months ago

Ncert is best and enough

3Thank You

Joseph Stalin 3 years, 8 months ago

No ncert is not enough

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Aman Yadav 3 years, 8 months ago

Bro ncert enough hai

4Thank You

ANSWER

If xy=e^x-y, then prove that dy/dx=y(x-1) /x(y-1)

Posted by Kavya P 3 years, 8 months ago

CBSE > Class 12 > Mathematics

1 answers

Sherma Subha 3 years, 8 months ago

given: xy = {e}^{x - y}xy=ex−y \begin{gathered}\frac{dy}{dx} = \frac{y(x - 1)}{x(y + 1)} \\\end{gathered}dxdy=x(y+1)y(x−1) solution: taking log on both side, log(xy) = log( {e}^{x - y} )log(xy)=log(ex−y) differentiate w.r.t x. \frac{d(logxy)}{dx} = \frac{d}{dx} \times log( {e}^{x - y} )dxd(logxy)=dxd×log(ex−y) \frac{d}{dx} \times ( log(x) + log(y) ) = \frac{d}{dx} \times log( log( {e}^{x - y} ) )dxd×(log(x)+log(y))=dxd×log(log(ex−y)) \frac{1}{x} + \frac{1}{y} \times \frac{dy}{dx} = \frac{1}{ {e}^{x - y} } - \frac{dy}{dx}x1+y1×dxdy=ex−y1−dxdy \frac{1}{y} \times \frac{dy}{dx} + \frac{dy}{dx} = \frac{1}{ {e}^{x - y} } - \frac{1}{x}y1×dxdy+dxdy=ex−y1−x1 \frac{dy}{dx} \times ( \frac{1}{y} + 1) = \frac{1}{ {e}^{x - y} } - \frac{1}{x}dxdy×(y1+1)=ex−y1−x1 \frac{dy}{dx} = \frac{1}{ {e}^{x - y} } - \frac{1}{x} \div ( \frac{1}{y} + 1)dxdy=ex−y1−x1÷(y1+1)

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If A is a square matrix of order 3 and | A|= 7. Write the value of | adj. A|.

Posted by Rajat Yadav 3 years, 8 months ago

CBSE > Class 12 > Mathematics

3 answers

Sherma Subha 3 years, 8 months ago

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Prakhar Gupta 3 years, 8 months ago

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Jahnvi Bansal 3 years, 8 months ago

It will be 49

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ANSWER

Maths channel in YouTube with crystal clear concept and easy explanation

Posted by Diti Urvija 3 years, 8 months ago

CBSE > Class 12 > Mathematics

4 answers

Jahnvi Bansal 3 years, 8 months ago

Apni kaksha is also there...

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Jahnvi Bansal 3 years, 8 months ago

Neha agarwal mathematically inclined

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Saloni Kaushik 3 years, 8 months ago

Don't Memorise is also good with Arvind academy

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Student Of The Year 3 years, 8 months ago

I think Arvind Academy

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ANSWER

2019 set c class 12 question along with solution

Posted by Anish Kafle 3 years, 8 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Which sample paper is best oswal or arihant or together with?

Posted by Shubhanshu Tiwari 3 years, 8 months ago

CBSE > Class 12 > Mathematics

3 answers

Prakhar Gupta 3 years, 8 months ago

Oswal... Absolutely

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Saloni Kaushik 3 years, 8 months ago

Yup oswal is best

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Pandey Ji 3 years, 8 months ago

I think oswal

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ANSWER

X/(x+1)(x+2) dx

Posted by Sunita Dahmiwal 3 years, 8 months ago

CBSE > Class 12 > Mathematics

1 answers

Rajat Yadav 3 years, 8 months ago

LOG|(x+2)²/(x+1)|

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ANSWER

2-2=

Posted by Gopal Gour 3 years, 8 months ago

CBSE > Class 12 > Mathematics

1 answers

Harmanpreet Singh 3 years, 8 months ago

0 ?

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ANSWER

Find the

Posted by Neelesh Kharkwal 3 years, 8 months ago

CBSE > Class 12 > Mathematics

1 answers

Neelesh Kharkwal 3 years, 8 months ago

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ANSWER

In vector summary it is written , direction cosines ...l = a/r , m= b/r , n = c/r . Here a,b,c are direction ratios and r is magnitude of vector . But in three dimensional geometry chapter it is written l= ak , m = bk , n= ck ... where a,b,c are direction ratios and l,m,n are direction ratios.. How is so possible

Posted by Usha Bharti 3 years, 8 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Evaluate √2sin2x cos2x dx

Posted by Surath Panda 3 years, 8 months ago

CBSE > Class 12 > Mathematics

3 answers

Kanishk Gupta 3 years, 8 months ago

2cos4x/√sin4x

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Aryan Swami 3 years, 8 months ago

Using 2sinx×cosx=sin2x, √2sin2x×cos2x = √sin4x

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Nidhirvyay Naman Palariya 3 years, 8 months ago

Root whole me ya srif 2sin2x pe ?

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ANSWER

y= (logx +√x²+1)² to prove (1+x²)d²y/dx² + x dy/dx

Posted by Sushil Verma 3 years, 8 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Easy chapters of maths

Posted by Diti Urvija 3 years, 8 months ago

CBSE > Class 12 > Mathematics

3 answers

Prashant Pathak 3 years, 8 months ago

All chapters are easy enough

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Satyam Suman 3 years, 8 months ago

Maths is tough man..... No chapter is easy at all

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Vivek Chaurasia 3 years, 8 months ago

Chap 1,2,3,4,5,6,7,8,10,12,13 ye sab easy ha yrr bss thoda focus karo ga tho ho jaayega . but chap 9 and 11 mughe vi thoda tough lagta ha

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How to study maths in last 2 months

Posted by Khushbu Singh✍️ 3 years, 8 months ago

CBSE > Class 12 > Mathematics

1 answers

Abhijeet Shakya 3 years, 8 months ago

Bss daily k ache se 2-3 hr de do maths ko maths me 90+ bdhe aaram se aajayenge

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ANSWER

Suggest a good teacher of maths in YouTube

Posted by Khushbu Singh✍️ 3 years, 8 months ago

CBSE > Class 12 > Mathematics

3 answers

Arif Khan 3 years, 8 months ago

Arvind academy

1Thank You

Vivek Chaurasia 3 years, 8 months ago

Pehle Cbse class video lo fir neha maam ka usi chap ma summary padh lo

1Thank You

Abhijeet Shakya 3 years, 8 months ago

Apni kaksha/mathematically inclined

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ANSWER

Find the direction cosines of the line : (2x+5)/2=(3-2y)/3=(3z+1)/4

Posted by Manjot Kaur 3 years, 8 months ago

CBSE > Class 12 > Mathematics

1 answers

Shubham Hatwal 3 years, 7 months ago

(1,3/2,4/3)

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ANSWER

Inverse cos x upon 1 minus sin x in simplest form

Posted by Shivam Kumar Ji 3 years, 8 months ago

CBSE > Class 12 > Mathematics

1 answers

Shubham Hatwal 3 years, 7 months ago

=Cosx÷[1-sinx] =Sin(π/2-x)÷[1-cos(π/2-x] =2sin(π/4-x/2)cos(π/4-x/2)÷2sin^2(π/4-x/2) =cot(π/4-x/2) {Formula used in third step is (sin2x=2 sinxcosx ) and (1-cos2x= 2sin^2(x) ) }

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Universe Boss 1 - sin x in simplest form

Posted by Shivam Kumar Ji 3 years, 8 months ago

CBSE > Class 12 > Mathematics