Practice Question and Answer

Q:

The side QR of an equilateral triangle PQR is produced to the point S in such a way that QR = RS and P is joined to S. Then the measure of ∠PSR is

744 0

  • 1
    30°
    Correct
    Wrong
  • 2
    15°
    Correct
    Wrong
  • 3
    60°
    Correct
    Wrong
  • 4
    45°
    Correct
    Wrong
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Answer : 1. "30° "

Q:

In a triangle, if orthocentre, circumcentre, incentre and centroid coincide, then the triangle must be

891 0

  • 1
    obtuse angled
    Correct
    Wrong
  • 2
    isosceles
    Correct
    Wrong
  • 3
    equilateral
    Correct
    Wrong
  • 4
    right-angled
    Correct
    Wrong
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Answer : 3. "equilateral "

Q:

if (1+sinα) (1-sinβ) (1+sinγ)= (1-sinα) (1-sinβ) (1-sinγ)=?

835 0

  • 1
    ±cosαcosβcosγ
    Correct
    Wrong
  • 2
    ±sinαsinβsinγ
    Correct
    Wrong
  • 3
    ±sinαcosβsecγ
    Correct
    Wrong
  • 4
    ±sinαsinβcosγ
    Correct
    Wrong
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Answer : 1. "±cosαcosβcosγ"

Q:

The elimination of θ from x cosθ-y sinθ=2 and x sinθ + ycosθ = 4 will give

812 0

  • 1

    x2+y2=20

    Correct
    Wrong
  • 2

    3x2+y2=20

    Correct
    Wrong
  • 3

    x2-y2=20

    Correct
    Wrong
  • 4

    3x2-y2=10

    Correct
    Wrong
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Answer : 1. "

x2+y2=20

"

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