Class 12 Mathematics Sample Paper
Refer to below provided Class 12 Mathematics Sample Paper with solutions. These Guess papers for Mathematics Class 12 have been designed based on the latest examination guidelines and paper pattern issued by CBSE. We have provided all Sample Papers for Class 12 Mathematics with answers. You can click on the links below to access the practice papers for free.
CBSE Sample Papers for Class 12 Mathematics
Class 12 Mathematics Sample Paper Term 2 Set A
Section – A
1. Find: ∫1/dxcos2x(1=tanx)2
OR
Evaluate:∫dx/1- tanx
Answer: We have given
2. Determine the order and degree of the following differential equation
d2y/dx2 =cos3x+sin3x
Determine the order and degree of the following differential equation:
d/dx(dy/dx)=5
Sol. Here, d/dx(dy/dx)=5
⇒ d2y/dx2=5 ⇒ [d2y]/dx2]-1=5
∴ order = 2 and degree = 1
and sum = 2 + 1 = 3.
Answe: d2y/dx2-cos3x=0
The highest order derivative present in the differential equation is
d2y/dx2. Therefore, its order is two.
It is a polynomial equation in d2y/dx2and the power raised to d2 y/dx2 is 1.
Hence, its degree is one.
3. Find a vector r equally inclined to the three axes and whose magnitude is 3√ 3 units.
Answer: We have
Since, r→ is equally inclined to the three axes, direction consines of the unit vector r→ will be same.
i.e. l = m = n
Now we know that,
4. Find the value of λ such that the line x-2/6=y-1/λ==z+5/-4 is perpendicular to the plane 3x–y–2z = 7.
Answer: Given that line x-2/6=y-1/λ/-1=z+5/-4 is perpendicular to plane 3x – y – 2z = 7
6/3=λ/-1/-4/-2
[∴ When a line is perpendicular to a plane, their direction ratios are proportional]
5. Three persons A, B and C, fire at a target in turn, starting with A. Their probability of hitting the target are 0.4, 0.3 and 0.2 respectively. Find the probability of two hits.
Answer: Here,
6. A die is rolled. Consider the events
A = {2,4,6}, B = {4,5}, C = {3,4,5,6}
Find P[A ∪ B/C].
Answer:
Section – B
7. Evaluate :∫0π/2 log sinx dx
Answer:
8. Solve the following differential equation :
dy/dx+y =cos x- sin x
OR
Given that dy/dx= e-2y and if x = 5, then y = 0. When y = 3, then find the value of x.
Answer: Given differential equation is
dy/dx+y=cosx-sinx …(1)
9. Using vectors, find the area of a triangle with vertices A (1, 1, 2), B (2, 3, 5) and C(1, 5, 5).
Answer:
10. Find the shortest distance between the following pair of lines :
OR
Find the cartesian equation of the line passing through the point A (1, 2, –4) and perpendicular to the lines:
x-3/1=y-5/-2=z-7/1 and x+1/7=y+1/-6=z+1/1
OR
Find the cartesian equation of the line passing through the point A (1, 2, –4) and perpendicular to thelines:
x-4/2=y-2/3=z-3/4 and x-1/1=y+2/-3=z-3/5
Answer:
Section – C
11. Evaluate :∫3x+4/(x-1)(x-3)dx
Answer: Let
Put
12. Find the area of the region enclosed between the parabola 4y = 3×2 and the line 3x – 2y + 12 = 0.
OR
Find the area of the region quadrant enclosed by x-axis, line x = √3y and the circle x2 + y2 = 4.
Answer:
13. Find the distance of point
from the line
measured parallel to the plane x – y + 2z –3 = 0.
Answer:
14. In an office three employees Vinay, Sonia and Iqbal process incoming copies of a certain from. Vinay processes 50% of the forms. Sonia processes 20% and Iqbal processes the remaining 30% of the forms.
Vinay has an error rate of 0.06%, Sonia has an error rate of 0.04% and Iqbal has an error rate of 0.03%.
Based on the above information answer the following:
(i) The total probability of committing an error in processing the form is?
(ii) The manager of the company wants to do a quality check. During inspection he selects a form at random from the days output of processed forms. If the form selected at random has an error, the probability that the form is NOT processed by Vinay is?
Answer:
