MathematicsTrigonometry (NTSE Stage1 (StateLevel) ScholasticAptitude & Language Comprehension): Questions 19  23 of 48
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Question number: 19
» Mathematics » Trigonometry
Question
If from a circular sheet of paper of radius 10 cm, a sector of area 40 % is removed and the remaining is used to make a conical surface, then the angle at the vertex will be
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 20
» Mathematics » Trigonometry
Question
If three sides of a right angled triangle are integers in their lowest form, then one of its sides is always divisible by
Choices
Choice (4)  Response  

a.  5 

b.  7 

c.  6 

d.  8 

Question number: 21
» Mathematics » Trigonometry
Question
If , then the value of is
Choices
Choice (4)  Response  

a.  1 

b.  1 

c.  2 

d.  2 

Question number: 22
» Mathematics » Trigonometry
Question
The angle of elevation of a cloud at a height h above the level of water in a lake is and the angle of depression of its image in the lake is . Then, the height of the cloud above the surface of the lake is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  None of the above 

Question number: 23
» Mathematics » Trigonometry
Question
The triangle formed by joining the vertices (3, 2), (5,  3) and ( 5, 4) will be a
Choices
Choice (4)  Response  

a.  isosceles triangle 

b.  right angled triangle 

c.  obtuse triangle 

d.  acute triangle 
