Mathematics Test
5 Questions
| Attempts: 230
Take this test for checking your knowledge in Mathematics of class 12.
Remember one or more options may be correct.
Questions and Answers
- 1.
5+8cos(@)+4cos(2@)+cos(3@) can take values, where @ is a real angle.
- A.
-3
- B.
-1
- C.
1
- D.
3
- E.
5
Correct Answer(s)
C. 1
D. 3
E. 5 -
- 2.
If a,b,c,d belongs to R-{0} & (d+a-b)^2 + (d+b-c)^2=0, then roots of quadratic equation a(b-c)X^2+b(c-a)X+c(a-b)=0
- A.
May be equal
- B.
Cannot be equal
- C.
May be real & rational
- D.
Must be real & rational
Correct Answer(s)
B. Cannot be equal
C. May be real & rational -
- 3.
A circle of radius 'r' is tangent to parabola Y^2=4aX at 2 distinct points. {r,a}belongs to real nos. & a>0.Range of values of 'r' is
- A.
(2a,infinity)
- B.
(0,infinity)
- C.
(a,infinity)
- D.
(2V2,infinity)
- E.
(4a,infinity)
Correct Answer
A. (2a,infinity) -
- 4.
ABCD is a convex quadrilateral with angleBAC=50*, angleCAD=60*, angleCBD=30*, angleBDC=25*, If E is a point of intersection of AC & BD, angleAEB equals
- A.
90*
- B.
95*
- C.
85*
- D.
98*
Correct Answer
B. 95* -
- 5.
A circle of radius 'r' passes through origin & lines (k+7)X-(k-1)Y-4(k-5)=0, where k is parameter intersects circle at 90*, then 'r' equals
- A.
2V15
- B.
2V10
- C.
2V5
- D.
Depends on k
Correct Answer
B. 2V10 -
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Jan 03, 2013Quiz Edited by
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Jul 16, 2009Quiz Created by
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