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Guys Tell me, Kya class12th main 90%+ lane k liye ncert book sufficient hai. Yadi nhi hai toh maths physics and chemistry k liye konsi book acchi hai. And kya chapterwise question karna sahi rhega. Jaldi bto..tnx

Posted by Just Example 4 years, 1 month ago

CBSE > Class 12 > Mathematics

2 answers

Mohit Kashyap 4 years, 1 month ago

NCERT and then Rd sharma for maths kyunki NCERT mai practice keliye bohot kam questions hai

3Thank You

Nishant Pandey 4 years, 1 month ago

Obviously, NCERT is sufficient, because it is provided by board. And board advised only & only NCERT to aquire whole syllabus. Jinhe NCERT samajh nhi aati, vo side book ka use kr skte hain. Aur ab suno jaldi ka kaam saitaan? ka.

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Posted by Just Example 4 years, 1 month ago

CBSE > Class 12 > Mathematics

0 answers

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If f(x)=1/xand g(x)=0 are two real function, then define fog, if it exist

Posted by Amisha Parmar 4 years, 1 month ago

CBSE > Class 12 > Mathematics

3 answers

Shanu Sharma 4 years, 1 month ago

fog does not exists as 1/0 is not defined but for approximation we say that 1/0 ----> infinity

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Amit Kumar 4 years, 1 month ago

F(0)= infinity

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Amit Kumar 4 years, 1 month ago

Does not exist

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Produce a bijection between (0,1) and R+. Hence deduce that R+ is also uncountable

Posted by Charu Panwar 4 years, 1 month ago

CBSE > Class 12 > Mathematics

0 answers

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Integration of x√(1+2x^2)

Posted by Arashdeep Kaur 4 years, 1 month ago

CBSE > Class 12 > Mathematics

2 answers

Monica Suresh 4 years, 1 month ago

Consider 1+2x=t Final ans ------> 1/6 ( 1+2x^2)^3/2 + C

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Stuti Trivedi 4 years, 1 month ago

1/6 (1+2x^2)^3/2

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integration of (x^2/1+x^3)dy/dx

Posted by Divyanshi Srivastava 4 years, 1 month ago

CBSE > Class 12 > Mathematics

0 answers

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Definite integral from -1 to 2 |x^3+x|

Posted by Neetika Sharma 4 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Stuti Trivedi 4 years, 1 month ago

21/4

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ANSWER

3x-1/(x+2)(x+2)

Posted by Imran Khan 4 years, 1 month ago

CBSE > Class 12 > Mathematics

0 answers

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Eveluate: intigeral of (1/cos(x-a).cos(x-b))dx

Posted by Aman Badhwar 4 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Tanisha Yadav 4 years, 1 month ago

1/sin(a-b)log|cos(x-a)/cos(x-b)|+C

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Prove that the volume of the largest cone that can be inscribed in a square of radius R is 8/27 of the volume of the sphere.

Posted by Aman Badhwar 4 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Gaurav Seth 4 years, 1 month ago

Let r and h be the radius and height of the cone respectively inscribed in a sphere of radius R.

Let V be the volume of the cone.

∴ By second derivative test, the volume of the cone is the maximum when

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ANSWER

Find dy/dx, If X=a[cos t +log(tan(t/2))] and y = a sin t

Posted by Aman Badhwar 4 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Gaurav Seth 4 years, 1 month ago

x = a(cost + log tant/2)

differentiate with respect to t,

dx/dt = d{a(cost + logtan t/2)}/dt

= a[d(cost)/dt + d(logtan t/2)/dt]

= a[ -sint + 1/tan t/2 × sec²t/2× 1/2]

= a [ -sint + 1/{2sin t/2.cos t/2} ]

we know, 2sinA.cosA = sin2A , use it here

= a [ -sint + 1/sint]

= a { 1 - sin²t}/sint

= acos²t/sint

= acott. cost .......(1)

again, y = asint

dy/dt = acost .......(2)

now, dy/dx = {dy/dt}/{dx/dt}

= {acost}{acott.cost}

= 1/cott

hence, dy/dx = tan t

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Solve the system of equations using Matrix method: 2 X + 3 y + 3 z equals to 5 X- 2 y + z = - 4 3 x - y - 2 z = 3

Posted by Aman Badhwar 4 years, 1 month ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Find the coefficient of x^k in 1 + ( 1 + x ) + ( 1 + x )² + ...........+ ( 1 + x )ⁿ where ( 0 ≤ k ≤ n ).

Posted by Shraddha ✨✰✰ 4 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Monica Suresh 4 years, 1 month ago

n+1 C k+1

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ANSWER

Sinx -cosx

Posted by Rajat Sharma 4 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Sonal . 4 years, 1 month ago

Y=sinx-cos dy/dx=cos+sinx Integration Ans= -cosx-sinx

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Exercise 7.5 question 6

Posted by Manya Chaturvedi 4 years, 1 month ago

CBSE > Class 12 > Mathematics

0 answers

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Cos (sin inverse x^2

Posted by Ramkripal Yadav 4 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Acinta Sofiya 4 years, 1 month ago

d/dx cos (sin^-1x^2) = -2x sin (sin^-1 x^2) / root 1-x^4

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Who want sample paper should be there on this particular app..??

Posted by Kanika Yadav 4 years, 1 month ago

CBSE > Class 12 > Mathematics

2 answers

Kanika Yadav 4 years, 1 month ago

Yahh

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Divyanshu Patrewal 4 years, 1 month ago

Me this should be aploaded

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ANSWER

When will sample paper issuded?

Posted by Kanika Yadav 4 years, 1 month ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

How to solve onto functions...

Posted by Krati Varshney 4 years, 1 month ago

CBSE > Class 12 > Mathematics

2 answers

Krati Varshney 4 years, 1 month ago

Thnks alot ??

1Thank You

Shraddha ✨✰✰ 4 years, 1 month ago

A function is said to be onto , if there exist an x for every y . hence to prove a function to be onto just solve the function for an x . And Mere tarike se yaad rakhane k liye → Range of given function. = co-domain of given function. ??I hope ye apko helpful hoga .????▪▫▫▫▫▫▪▪▪▪▪▪

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If A=[5 7 9][9 8 7][19 14 9],then find|A|

Posted by Aman Badhwar 4 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Shraddha ✨✰✰ 4 years, 1 month ago

Ans. → 0 =5 (72 - 98) - 7(81 - 133) + 9(126 - 152) = -130 +364 - 234 = 0 .

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The area of a triangle with vertices(-3,0),(3,0)and(0,k) is 9 sq.units. find the value of k.

Posted by Aman Badhwar 4 years, 1 month ago

CBSE > Class 12 > Mathematics

2 answers

Shraddha ✨✰✰ 4 years, 1 month ago

Ans. → = 1/2( x1 ( y2 - y3 ) + x2 ( y3 - y1 ) + x3 ( y1 - y2) = 1/2 [ -3 ( 0 - k ) + 3 ( k - 0 ) + 0 ( 0 - 0 ) = 1/2 [-3(k) + 3k + 0 ] = 1/2 ( 3k + 3k ) .°. 3k = 9 (°.° ar.∆ABC = 9 unit² ) .°. k = 3 ans.

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Krati Varshney 4 years, 1 month ago

Use the formula of area of triangle :- 1/2 (x1(y2-y3)+x2 (y3-y1)+x3 (y1-y2))=0 Put all the given values in this then u will get ur answer urself..??

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Show that the height of the right circular cylinder of greatest volume which can be inscribed in a right circular cone of height h and radius r is one-third of the height of the cone, and the greatest volume of the cylinder is 4/9 times the volume of the cone.

Posted by Atul Kumar 4 years, 2 months ago

CBSE > Class 12 > Mathematics