The Tutorials

You Like Post Please Comment Or +Google and Say Our Advice And Share To Others Person

CBSE Papers, Questions, Answers, MCQ ...

UPTET (Uttar Pradesh Teacher Eligibility Test) सरकारी नौकरी , नियुक्ति परिणाम , टीईटी , UPTET , TET

CBSE Important Questions class XII mathematics 2008 3

Q. 1.
Ans. x = 1, z = 4, y = 3
Q. 2.
Ans. -1
Q. 3. Using the method of matrices solve
Ans.
Q. 4. Using properties of determinants solve for x
Ans.
Q. 5. If
Q. 6. If
Q. 7.
Ans. a = 1, b = -1
Q. 8.
Ans. a = 1/2
Q. 9. Solve for x : 2tan-1 (cosx) = tan-1 (2cosx)
Ans. x = 2n P ± P /2
Q. 10. (a) If tan-1 x + tan-1 y + tan-1 z = P /2 .Evaluate xy + yz + xz
Ans. 1
(b) If tan-1 x + tan-1 y + tan-1 z = P Evaluate
Q. 11. Show that
  1. sin.cot -1 tan cos -1 x = x
  2. sec2 (tan-1 2)+cosec2 (cot-13) = 15
Q. 12. Prove that the function f : R -> {x E R –1 is one –one and onto function and hence find its inverse.
Q. 13. Let A=QxQ.Let * be a binary operation on A defined by (a,b) * (c,d)=(ac,ad+b).
  1. Find the identity element
  2. Find the invertible element .
Ans. (i) (1,0) (ii) (1/a,-b/a)

No comments:

Post a Comment

Related Posts Plugin for WordPress, Blogger...