Trigonometry ( 21 to 25 )

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Trigonometry ( 21 to 25 ):


APTITUDE QUESTIONS (TRIGONOMETRY):

21. If 3 tan = 4, then √((1-sin⁡θ)/(1+sin⁡θ )) is equal to

A)    1/2

B)    2/3

C)    1/3

D)    1

E)    None of these

View Answer

Answer: option  (C)

Explanation:

 

22. Given that 16 cot θ = 12, then (sin θ + cos θ) / (sin θ-cos θ) is equal to

A)    7

B)    -7

C)    1/7

D)    2/7

E)    None of these

View Answer

Answer: option  (A)

Explanation:

 

23. What is the value of cot 15º cot 20º cot 70º cot 75º ?

A)    -1

B)    0

C)    1

D)    2

E)    None of these

View Answer

Answer: option  (C)

Explanation:

 

24. If tan θ + 1/tan θ = 2, then the value of tan2 θ + 1/tan2 θ is equal to


A)    6

B)    4

C)   2

D)    3

E)    None of these

View Answer

Answer: option  (C)

Explanation:
∵ (tan θ + 1/tan θ)2 = 22
tan2 θ+ 1/tan2 θ+ 2 = 4
tan2 θ+ 1/tan2 θ= 2

 

25. The value of sin 18º is

A)    √5+1 / 4

B)    (10+25) / 4

C)    5 – 1 / 4

D)    (10-25) / 4

E)    None of these

View Answer

Answer: option  (C)

Explanation:

 

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