First Year Mathematics Chapter 12 Online MCQ Test for 1st Year Mathematics Chapter 12 Application of Trigonometry Preparation

• 
  A
• 
  B
• 
  C
• 
  D

r r₁ r₂ r₃ =

• 
  A
• 
  B
• 
  C
• abc D

If the elevation of the sun is 30°, the length of the shadow cast by a tower of 150m height is:

• 
  A
• 
  B
• 
  C
• none D

In a triangle ABC, (s - a)(s - b) = s(s - c), then the angle Γ =

• 
  A
• 
  B
• 
  C
• 
  D

If 2s = a + b + c, then in any triangle ABC:

• 
  A
• 
  B
• 
  C
• all of these D

• 
  A
• 
  B
• 
  C
• 
  D

The circum-radius R of a triangle is given by:

• 
  A
• 
  B
• 
  C
• 
  D

In triangle ABC, If Γ = 90° then:

• 
  A
• 
  B
• 
  C
• b = c + a D

If α, ß, Γ are the angles of a oblique triangle, then:

• α = 90° A
• ß = 90° B
• Γ = 90° C
• none of these D

• r₁ A
• r₂ B
• r₃ C
• r D

In a triangle ABC if a² - b² + c² = ac then < ß =

• 
  A
• 
  B
• 
  C
• 
  D

In a triangle ABC b = √3, c = 1, α = 30° then a = :

• 2 A
• 1 B
• 3 C
• -1 D

r₂ =

• 
  A
• 
  B
• 
  C
• 
  D

If 2s = a + b +c, then in any triangle ABC:

• 
  A
• 
  B
• 
  C
• none of these D

The in-radius r of a triangle is given by:

• 
  A
• 
  B
• 
  C
• 
  D

When two sides and included angle is given, then area of triangle is given by:

• 
  A
• 
  B
• 
  C
• all of these D

In any triangle ABC, law of tangents is:

• 
  A
• 
  B
• 
  C
• all of these D

• right angled A
• equilateral B
• isosceles C
• obtuse angled D

The lengths of the sides of a triangle are proportional to the sines of the opposite angles to the sides. This is known as:

• The law of sines A
• The law of cosines B
• The law of tangents C
• The fundamental law D

If triangle ABC, If ß = 90° then:

• 
  A
• 
  B
• 
  C
• none of these D