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Trigonometry ( 21 to 25 ):
APTITUDE QUESTIONS (TRIGONOMETRY):
21. If 3 tan = 4, then √((1-sinθ)/(1+sinθ )) 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+2√5) / 4
C) √5 – 1 / 4
D) √(10-2√5) / 4
E) None of these
View Answer
Answer: option (C)
Explanation: