Chapter 3: Trigonometry - Online Test
Q1. 1/cos 80̊ - √3/sin 80̊ =
Answer : Option D
Explaination / Solution:
Q2. If cos 28̊ + sin 28̊ = k3, then cos 17̊ is equal to
Answer : Option A
Explaination / Solution:
Q3. The maximum value of 4 sin2x + 3cos2x
+ sin x/2 + cos x/2 is
Answer : Option A
Explaination / Solution:
Q4. 
Answer : Option A
Explaination / Solution:
Q5. If 
, equal to
, equal to
Answer : Option D
Explaination / Solution:
2sinθ or (1) -2cosθ Please dont refer this solution for examination)
Q6. If tan40̊ = λ, then 
=
=
Answer : Option D
Explaination / Solution:
Q7. cos 1̊ + cos 2̊ + cos 3̊ + …. + cos 179̊ =
Answer : Option A
Explaination / Solution:
Q8. Let fk(x)
=1/k [sinkx + coskx]
where x ∊ R and k ≥ 1. Then f4(x)
- f6(x) =
Answer : Option B
Explaination / Solution:
Q9. Which of the following is not true?
Answer : Option D
Explaination / Solution:
Q10. cos2θ cos2ϕ + sin2 (θ - ϕ) - sin2 (θ + ϕ) is equal to
Answer : Option B
Explaination / Solution:
