CBSE Important Questions

Mathmatics Class X

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  1. A triangle ABC is right-angled at B, If sin(A - C) = 0 then the value of 2A + C is

    (a) 90 0

    (b) 135 0

    (c) 145 0

    (d) 180 0

  2. What must be subtracted from the polynomial resulting polynomial is exactly divisible by x2-4x+3.
    (a) 2x – 3

    (b) 2x + 3

    (c) 3x +2

    (d) none

  3. If one root of the is polynomia reciprocal of the other, then the value of k is
    (a) 0

    (b) 5

    (c)1/6

    (d) 6

  4. If the mean and median of a set of numbers are 8.9 and 9 respectively, then the mode will be

    (a) 7.2

    (b) 8.2

    (c) 9.2

    (d) 10.2

  1. In the adjoining figure ABC is a right triangle, right angled at B. Ad and CE and the two medians drawn from A and C respectively. If AC = 5 cm and cm, find the length

  1. (a) 0

    (b) 1

    (c) -1

    (d) 2

  2. If cos(α + β ) =0, then sin(α −β ) can be reduced to :

    (a) cosβ

    (b) cos 2β

    (c) sinα

    (d) sin 2α

  3. The value of a and b such that is divisible by give the remainder 3x + 5

    (a) a = 5 , b = -7

    ((b) a = - 5 , b = 7

    ((c) a = 5, b = 7

    ((d) none .

  4. In an isosceles triangle ABC ,If AC = BC and

    5. (a) 450

    (b) 60 0

    (c) 90 0

    (d) 300

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