Jharkhand 12th Board Maths Unofficial Answer Key 2026: Jharkhand Academic Council today(Feb 5) conducted the Maths exam for class 12 between 2 PM and 5:15 PM at designated exam centres. According to the initial reactions of the examinees, the question paper was of a moderate level. The maths paper was of a total of 80 marks, and 20 marks were allotted to the internal assessment.
Students had to answer a mixture of objective-type, very short, short, and long answer-type questions. If you are searching for the correct answers to the questions asked in the paper, you can check unofficial answer key PDFs. We have added Jharkhand 12th Board Maths unofficial answer key 2026 and detailed paper analysis on this page.
Jharkhand 12th Board Maths Unofficial Answer Key 2026
Students who have appeared for the mathematics paper can get an idea of the total number of questions they attempted correctly from the answer keys. We have provided Jharkhand 12th Board Maths unofficial answer key 2026 PDF in the table below:
| Jharkhand 12th Board Maths Exam 2026 Questions | Answers |
| Q1) The relation R on set A is called an empty relation if and only if | A) R=∞ |
| Q2) If f: R-R such that f(x)=6x-5 then f-1(x)= | A) x+5/6 |
| Q3) If y=cos-1 x then | A) 0<=y<=π |
| Q4) principal value of tan-1(-1) is | B) -π/4 |
| Q5) if [x+y = [1] z+x] -1 then x+y+z= | B) 0 |
| Q6) If A =[2 4 | D) None of these |
| Q7) If A= [ 4 x+2 | C) 5 |
| Q8) If |x 3| = |6 2| | D) None of these |
| Q9) | cos 30 degree sin 30 degree| | sin 30 degree cos 30 degree| | A) 1/2 |
| Q10) d/dx(cos 3x) = | B) -3 sin 3x |
| Q11) d/dx tan -1(x2)= | A) 2x/1+x4 |
| Q12) d/dx esinx= | A) esinx. cosx |
| Q13) d/dx(log sec x)= | A) tan x |
| Q14) d/dx(etan-1x)= | A) etan-1x/1+x2 |
| Q15) d/dx(ax) = | A) axloga |
| Q16) If x= a cos o, y = a sino, find dy/dx | A) -cot o |
| Q17) ſsin(2x+2)dx= | B) - cos(2x+3)/2+C |
| Q18) ſtan2 xdx= | C) tanx-x+C |
| Q19) ſdx/x2+16= | A) 1/4tan-1(x/4)+0 |
| Q20) ſπ/2√ 1+cos2x dx= | D) None of these |
| Q21) eſ1 (logx)2/xdx= | C) 1/3 |
| Q22) ſ ex(log secx+tanx)dx= | C) ex (logsecx)+C |
| Q23) The order of the differential equation d2y/dx2=/1+(dy/dx)2 | B) 2 |
| Q24) If a=2i-7j-3k then a= | A) 2i-7j-3k//62 |
| Q25) For what value of x, vectors xi-3j-5k and i+j+2k are perpendicular to each other | C) -13 |
| Q26) Find the projection of vector a=2i+3j+2k on the vector b=i+2j+k | B) 10/6 |
| Q27) Find the value of (2i+3j)x (i+2j) | D) None of these |
| Q28) If a line makes angles α β γ with coordinate axes, then sin2 α +sinβ +sin2 γ = | A) 2 |
| Q29) If P(A)=0.8, P(B) =0.5 and P(B/A)= 0.4 then P(A B) | C) 0.32 |
| Q30) A line passing through (2, -1, 3) has direction ratio(3,-1,2) then its equation is | C) x-2/3= y+1/-1=z-3/2 |
Overview of Question Paper Analysis for JAC 12th Board Maths 2026
According to the review given by students, the overall paper was moderate with a few challenging questions. Discover Jharkhand 12th Board Maths paper analysis here:
| Sections | Difficulty Level |
| Part A | moderate |
| Part B (Section A) | moderate |
| Part B (Section B) | moderate to tough |
| Part B (Section C) | moderate |
Students can check Jharkhand 12th Board Maths unofficial answer key 2026 PDFs to analyse probable marks before the result declaration.