(tan 7o) (tan 23o) (tan 60o)(tan 67o)(tan83o) is
0
7
1
√3
The value of sin 20o sin 40o sin 60o sin 80o is equal to
-3/16
5/16
3/16
-5/16
The minimum value of 5 sin2θ + 4 cos2θ is
2
3
4
-1
None of these
The value of cos 1o cos 2o cos 3o .... cos 100o =
-b
If sin θ + cosec θ = 2, then sin2 θ + cosec2 θ is equal to
6
The value of Cos2θ + Sec2θ is always
Less than 1
Equal to 1
Greater than 1, but less than 2
Greater than or equal to 2
The value of Cos2 A ( 3-4 cos2 A)2 + sin2 A ( 3-4 sin2A)2 =
Cos 4 A
sin 4A
If sin (∝ - β) = 1/2 and cos (∝ + β) = 1/2, where ∝ and β are positive acute angles, then:
∝ = 45o
β= 15o
∝= 15o, β = 45o
∝ = 60o, β = 15o
The expression tan2∝+ cot2 ∝ is
≥ 2
≤ 2
≥ -2
= 2
