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2017 10 math sample paper sa1 solved 02 ans 9wis9w31

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CBSE Sample Paper -02 SUMMATIVE ASSESSMENT I Class X Mathematics Time allowed: 3 hours Maximum Marks: 90 Answers SECTION A 1. Here, 12 + 16 = 144 + 256 = 400 18 2 2 2 The give triangle is not a right triangle. 2. Let x= 0.6 . Then, x = 0.666 (i) (ii) 10x= 6.666 On subtracting (i) from (ii), we get 9x = 6 Thus, 0.6 = 3. x= 6 2 = 9 3 2 3 sec 2 (1 + sin )(1 sin ) = sec 2 (1 sin 2 ) [(a + b)(a b) = a 2 b 2 ] = sec 2 .cos 2 = 1 [Q cos 2 + sin 2 = 1] Therefore, k = 1. 4. tan18o cot 64o = sin(90o 64o ) cot 64o = =1 cot 64o cot 64o SECTION B 5. 1 , 0o 90o. sec (Given) Q sec in the denominator. The min. value of sec will return max. value for 1 . sec But the min. value of sec is sec 0 = 1. Material downloaded from http://myCBSEguide.com and http://onlineteachers.co.in Portal for CBSE Notes, Test Papers, Sample Papers, Tips and Tricks

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