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Class 12 Exam 2016 : Computer Science

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Std. XII Sci.: Perfect Maths - I TARGET Publications Board question paper (Maths) : March 2013 Note: i. ii. iii. iv. v. All questions are compulsory. Figures to the right indicate full marks. Solution of L.P.P. should be written on graph paper only. Answers to both the sections should be written in the same answer book. Answer to every new question must be written on a new page. SECTION I Q.1. (A) i. Select and write the correct answer from the given alternatives in each of the following: (6) [12] The principal solution of the equation cot x = 3 is (A) (B) 3 (C) ii. 6 5 6 (D) + 4 are coplanar, then the value of p is j 2k, i + 2k, i pj If the vectors 3i (A) 2 (B) 1 (C) iii. 5 6 1 (D) 2 If the line y = x + k touches the hyperbola 9x2 16y2 = 144, then k = (A) (C) (B) 7 7 7 (D) 19 (B) Attempt any THREE of the following: i. Write down the following statements in symbolic form: (a) A triangle is equilateral if and only if it is equiangular. (b) Price increases and demand falls. ii. 2 2 1 If A = , then find A by adjoint method. 4 3 iii. Find the separate equations of the lines represented by the equation 3x2 10xy 8y2 = 0. iv. Find the equation of the director circle of a circle x2 + y2 = 100. v. (6) Find the general solution of the equation 4 cos2 x = 1. Board Question Paper 401

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