Please give the answer of this. PRE BOARD EXAMINATION
SESSION: 2018-19
CLASS XII
MATHEMATICS
SET-OI
Maximum Marks: 100
Time allowed: 3 hours
1. General Instructions:
(i)
(iii)
(iv)
(v)
(vi)
(vii)
All questions are compulsory.
Please check that this question paper contains 29 questions.
Questions 1 - 4 in Section A are very short-answer type questions
carrying 1 mark each.
Questions 5 — 12 in Section B are short-answer type questions carrying 2
marks each.
Questions 13 - 23 in Section C are long-answer I type questions carrying
4 marks each.
Questions 24 - 29 in Section D are long-answer II type questions carrying
6 marks each.
Please write down the serial number of the question before attempting it.
SECTION A
Question numbers I to 4 carry I mark each.
I. Find tan-II + cos-1(Z;—)
@ If A is a square matrix of order 3 such that ladj Al=225, findlA'l.
3. Find the angle between two vectorsäand Bifläl =3 =2 andä.B=31/2.
4. If f: R •R be given by f (x) — x3)ä , find the vålue Of fof (x).
SECTION B
Question numbers 5 to 12 carry 2 marks each.
x2+1
(5. Show that sin [cot-I (cos(tan-l
211
, Show thatA2 -5A+71=O.
7, Ifx=a (0 — sin9) andy=a (1- cos B), findÆ
1
Math-Xil
