{"id":561221,"date":"2021-12-10T11:44:24","date_gmt":"2021-12-10T11:44:24","guid":{"rendered":"https:\/\/www.indcareer.com\/schools\/?p=561221"},"modified":"2021-12-23T16:29:28","modified_gmt":"2021-12-23T16:29:28","slug":"cbse-class-12-maths-answer-key-2021-2022","status":"publish","type":"post","link":"https:\/\/www.indcareer.com\/schools\/cbse-class-12-maths-answer-key-2021-2022\/","title":{"rendered":"CBSE Class 12 Maths Answer Key 2021-2022"},"content":{"rendered":"\n

CBSE Class 12th Maths Answer Key 2021-22<\/strong> \u2013 CBSE has conducted the class 12 mathematics exam on December 6, 2021, from 11:30 AM to 1:00 PM. Students can check CBSE Class 12 Maths question paper with answers from this page.<\/p>\n\n\n\n

\n
CBSE Class 12 Answer Keys 2021-2022<\/a><\/div>\n<\/div>\n\n\n\n

Ques. <\/strong>A relation R is defined on N Which of the following is the reflexive relation?
Ans.<\/strong> Correct option is (c)<\/p>\n\n\n\n

Ques. <\/strong>A function f R \u2014\u2014> R defined by f(x) = 4x+3 cosx is
Ans. <\/strong>Neither one-one nor onto<\/p>\n\n\n\n

Ques. <\/strong>If y = cot-1<\/sup>x, x<0, then
Ans. <\/strong>x\/2 <y<x<\/p>\n\n\n\n

Ques. <\/strong>The number of function defined from (1,2,3,4,5) \u2014> (a,b) which are one-one is:
Ans. <\/strong>0<\/p>\n\n\n\n

Ques. <\/strong>If A = [4,2 x -1,1], then (A-2I) (A-3I) is equal to
Ans. <\/strong>0<\/p>\n\n\n\n

Ques. <\/strong>If P is a 3\u00d73 matrix such that P = 2P+1, where P is the transpose of P, then
Ans. <\/strong>P = -I<\/p>\n\n\n\n

Ques. <\/strong>If order of matrix A is 2\u00d73, of matrix B is 3\u00d72, and matrix C is 3\u00d73, then which one of the following is not <\/strong>defined?
Ans. <\/strong>C(A+B\u2019)<\/p>\n\n\n\n

Ques. <\/strong>If A = [a,2 x 2,a] and |A3<\/sup>| = 27, then the value of a is
Ans. <\/strong>\u00b1\u221a7<\/p>\n\n\n\n

Ques. <\/strong>The function f(x) = (x) is the greatest integer function that is less than or equal to x, is continuous at
Ans. <\/strong>15<\/p>\n\n\n\n

Ques. <\/strong>If y = tan-1<\/sup>(e2x<\/sup>), then dy\/dx is equal to
Ans. <\/strong>2e2x<\/sup> \/ 1+e4x<\/sup><\/p>\n\n\n\n

Ques. <\/strong>If y2<\/sup>(2-x) = x3<\/sup>, then (dy\/dx)(1,1)<\/sub> is equal to
Ans. <\/strong>2<\/p>\n\n\n\n

Ques.<\/strong> The angle between the tangents to the curve y=x2-5x+6 at the points (2,0) and (3,0)
Ans.<\/strong> 2<\/p>\n\n\n\n

Ques.<\/strong> The interval in which function y=x3+6\u00d72+6 is increasing, is:
Ans.<\/strong> (-,-4)(0,)<\/p>\n\n\n\n

Ques.<\/strong> The value of x for which (x-x2) is maximum, is:
Ans.<\/strong> \u00bd<\/p>\n\n\n\n

Ques.<\/strong> If the corner points of the feasible region of LPP are (0,3), (3,2) and (0,5), then the minimum value of Z=11x+7y is:
Ans.<\/strong> 21<\/p>\n\n\n\n

Ques.<\/strong> The number of solutions of the system of inequations x+2y3, 3x+4y12, x0, y1 is:
Ans.<\/strong> 0<\/p>\n\n\n\n

Ques.<\/strong> The number of equivalence relations in the set {1,2,3} containing the elements (1,2) and (2,1) is:
Ans.<\/strong> 2<\/p>\n\n\n\n

Ques.<\/strong> Let f: RR be defined by f(x)=1x, for all xR. Then, f is:
Ans.<\/strong> not defined<\/p>\n\n\n\n

Ques.<\/strong> The function f:NN is defined by f(n)=n+12, if n is odd and n2, if n is evenThe function f is:
Ans.<\/strong> onto but not one-one.<\/p>\n\n\n\n

Ques.<\/strong> The value of sin-1cos 135 is:
Ans. <\/strong>-10<\/p>\n\n\n\n

Ques.<\/strong> If sin-1x>cos-1x, then x should lie in the interval:
Ans.<\/strong> 12,1<\/p>\n\n\n\n

Ques.<\/strong> If A=cos -sin    sin    cos and A+A\u2019=I, then the value of is:
Ans.<\/strong> 3<\/p>\n\n\n\n

Ques.<\/strong> The determinant y+k, y, y, y, y+k, y, y,y,y+k is equal to:<\/p>\n\n\n\n

Ques. <\/strong>If A=[1,-2,4,2,-1,3,4,2,0] is the adjoint of a square matrix B, the B-1 is equal to:
Ans.<\/strong> 12A<\/p>\n\n\n\n

Ques.<\/strong> If A=[1,-1,1,1,-1,1,1,-1,1], then A5-A4-A3+A2 is equal to:
Ans.<\/strong> 0<\/p>\n\n\n\n

Ques.<\/strong> If y=e-x, then d2ydx2 is equal to:
Ans.<\/strong> y<\/p>\n\n\n\n

Ques.<\/strong> If x=t2+1,y=2at, then d2ydx2 at t=a is:
Ans.<\/strong> -12a2<\/p>\n\n\n\n

Ques.<\/strong> The function f(x)={x2 for x<1 and 2-x for x1} is:
Ans.<\/strong> not differentiable at x=1<\/p>\n\n\n\n

Ques.<\/strong> The curve x2-xy+y=27 has tangents parallel to x-axis at:
Ans.<\/strong> (3,6) and (-3,-6)<\/p>\n\n\n\n

Ques.<\/strong> A wire of length 20 cm is bent in the form of a sector of a circle. The maximum area that can be enclosed by the wire is:
Ans. <\/strong>25 sq cm<\/p>\n\n\n\n

Ques.<\/strong> The function (x-sinx) decreases for:
Ans.<\/strong> no value of x<\/p>\n\n\n\n

Ques.<\/strong> If is the angle of intersection between the curves y2=4ax and ay=2x2at (a,2a), the the value of tan is:
Ans.<\/strong> 3\/5<\/p>\n\n\n\n

Ques.<\/strong> The maximum value of Z=3x+4y subject to the constraints x0,
Ans.<\/strong> 4<\/p>\n\n\n\n

Ques.<\/strong> The feasible region of an LPP is given in the following figure. Then, the constraints of the LPP are x0, y0 and
Ans.<\/strong> 2x+y104 and x+2y76<\/p>\n\n\n\n

Ques.<\/strong> If the minimum value of an objective function Z=ax+by occurs at two points (3,4) and (4,3) then:
Ans.<\/strong> a=b<\/p>\n\n\n\n

Ques.<\/strong> For the following LPP, Maximise Z=3x+4y subject to constraints x-y-1, x3, x0, y0
Ans.<\/strong> 25<\/p>\n\n\n\n

Ques.<\/strong> A relation r is defined on Z as: aRb if and only a2-7ab+6b2=0. Then, R is:
Ans.<\/strong> Reflexive but not symmetric<\/p>\n\n\n\n

Ques.<\/strong> The value of 1!,2!,3*3!, 2*2!, 3*3!,4*4!,3!,4!,5! is :
Ans.<\/strong> -24<\/p>\n\n\n\n

Ques.<\/strong> If 1, -tan, tan, 1[1, tan, -tan, 1]-1=[a,-b,b,a], then:
Ans.<\/strong> a=cos 2,b=sin 2<\/p>\n\n\n\n

Ques.<\/strong> The normal to the curve 3y=6x-5\u00d73 at the point (1,\u2153) passes through the point:
Ans.<\/strong> (3,1)<\/p>\n\n\n\n

Ques.<\/strong> If y=sin (2sin-1x), then (1-x2)y2 is equal to:
Ans.<\/strong> -xy1-4y<\/p>\n\n\n\n

Ques.<\/strong> The volume (V) of the casted half cylinder will be:
Ans.<\/strong> 12r2h<\/p>\n\n\n\n

Ques.<\/strong> The total surface area (S) of the casted half cylinder will be:
Ans.<\/strong> rh+r2+2rh<\/p>\n\n\n\n

Ques.<\/strong> The volume (V) of the casted half cylinder will be:
Ans.<\/strong> 12r2h<\/p>\n\n\n\n

Ques.<\/strong> The total surface area (S) of the casted half cylinder will be:
Ans.<\/strong> rh+r2+2rh<\/p>\n\n\n\n

Ques.<\/strong> The total surface area S can be expressed in terms V and r as:
Ans.<\/strong> r+2V(+2)r<\/p>\n\n\n\n

Ques.<\/strong> For the given half cylinder of volume V, the total surface area S is minimum, when:
Ans.<\/strong> (+2)V=2r3<\/p>\n\n\n\n

Ques.<\/strong> The ratio of h:2r for S to be minimum will be equal to:
Ans.<\/strong> :+2<\/p>\n\n\n\n

FAQs<\/h2>\n\n\n\n
When is the CBSE class 12 Term 1 Mathematics examination 2021-22?<\/strong><\/strong>

The CBSE Class 12 term 1 mathematics examination is on 6th December 2021.<\/p> <\/div>

What is total weightage of Term 1 mathematics examination?<\/strong><\/strong>

The total evaluation is of 50 marks out which 40 will be assessed via MCQ assessment and 10 will be assessed via internal marking.<\/p> <\/div>

How many total units have been asked in the Class 12th term 1 mathematics examination and which unit carries the highest weightage?<\/strong><\/strong>

CBSE has decided to include 4 units in the class 12 term 1 mathematics examination. Calculus carries 17 marks and is of the highest weightage.<\/p> <\/div>

When will the CBSE class 12th term 1 results come out?<\/strong><\/strong>

The CBSE class 12th term 1 results will come out in the last week of December 2021.<\/p> <\/div> <\/div>\n\n\n\n

Read More<\/h2>\n\n\n\n