If A = cos12° - cos36°sin96° + sin24° and B = sin60° - sin12°cos48° - cos72°, then what is AB = ?
- 1
0
1
2
sinA + sin2A + sin3A is equal to which of the following ?
1. 4sin2Acos2A2
2. 2sin2AsinA2 + cosA22
3. 8sinAcosAcos2A2
1 and 2 only
2 and 3 only
1 and 3 only
1, 2 and 3
If x = sin70° . sin50° and y = cos60° . cos80°, then what is xy = ?
116
18
14
12
If sinθ1 + sinθ2 + sinθ3 + sinθ4 = 4, then what is the value of :
cosθ1 + cosθ2 + cosθ3 + cosθ4 ?
4
What is the value of :
1 + cosπ81 + cos3π81 + cos5π81 + cos7π8 ?
12 + 122
12 - 122
If xcosθ + ysinθ = z, then what is the value of
xsinθ - ycosθ2 ?
x2 + y2 - z2
x2 - y2 - z2
x2 - y2 + z2
x2 + y2 + z2
If A = x ∈ ℝ : x2 + 6x - 7 < 0 and B = x ∈ ℝ : x2 + 9x + 14 > 0,
then which of the following is/are correct ?
1. A ∩ B = x ∈ R : - 2 < x < 12. AB = x ∈R : - 7 < x < - 2
Select the correct answer using the code given below :
1 only
2 only
both 1 and 2
neither 1 nor 2
If sin18° = 5 - 14, then what is the value of sin 81° ?
3 + 5 + 5 - 54
3 + 5 + 5 + 54
3 - 5 + 5 - 54
3 + 5 - 5 - 54
What is 1 - tan2° . cot62°tan152° - cot88° = ?
3
- 3
2 - 1
1 - 2
What is tan25°tan15° + tan15°tan50° + tan25°tan50° = ?