Maths Practice Question and Answer

Q:

If 2sinθ+cosθ= $${7\over3}$$ then the value of (tan2θ-sec2θ) is

949 0

  • 1
    0
    Correct
    Wrong
  • 2
    -1
    Correct
    Wrong
  • 3
    $${3\over7}$$
    Correct
    Wrong
  • 4
    $${7\over3}$$
    Correct
    Wrong
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Answer : 2. "-1"

Q:

The height and the radius of the base of a right circular cone are 12 cm and 6 cm respectively. The radius of the circular cross-section of the cone cut by a plane parallel to its base at a distance of 3 cm from the base is

907 0

  • 1
    4 cm
    Correct
    Wrong
  • 2
    5.5 cm
    Correct
    Wrong
  • 3
    4.5 cm
    Correct
    Wrong
  • 4
    3.5 cm
    Correct
    Wrong
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Answer : 3. "4.5 cm"

Q:

If S denotes the area of the curved surface of a right circular cone of height h and semi vertical angle ∝ then S equals

1008 0

  • 1
    $$πh^2 tan^2∝ $$
    Correct
    Wrong
  • 2
    $${1\over 3}πh^2tan^2∝$$
    Correct
    Wrong
  • 3
    $$πh^2sec∝tan∝$$
    Correct
    Wrong
  • 4
    $${1\over 3}πh^2sec∝tan∝$$
    Correct
    Wrong
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Answer : 3. "$$πh^2sec∝tan∝$$"

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