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# CBSE Pre Board Class 12 2016 : Mathematics (Kendriya Vidyalaya (KV) No. 1, Salt Lake)

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SAMPLE QUESTION PAPER MATHEMATICS CLASS XII: 2015-16 SAMPLE PAPER II Section A Question numbers 1 to 6 carry 1 mark each. 3 5 -1 Q1. Evaluate: sin(2 cos (- )). Q2. State the reason for the following Binary Operation *, defined on the set Z of integers, to be not commutative. a * b ab3 . Q3. Give an example of a skew symmetric matrix of order 3. Q4. Using derivative, find the approximate percentage increase in the area of a circle if its radius is increased by 2% . Q5. Find the derivative of f (etan x ) w.r. to x at x = 0. It is given that f (1) 5. Q6. If the lines x 1 y 4 z 3 x 2 y 5 z 1 are perpendicular to each other, and 2 3p 4 4p 2 7 then find the value of p. Section B Question numbers 7 to 19 carry 4 marks each. n 1, if n is odd . Then show that f is invertible. n 1, if n is even Q7. Let f : W W be defined as f (n) Also, find the inverse of f. OR 1

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