The value of cot (45o + θ) cot (45o - θ) is:
-1
0
1
∞
The value of x for the maximum value of√3 cos x + sin x, is
30o
45o
60o
90o
If cos θ = 1/2 (x + 1/x), then 1/2 (x2 + 1/x2) is equal to
sin 2 θ
cos 2 θ
tan 2 θ
sec2 θ
If tan A = - 1/2 and tan B = - 1/3, then A+B =
∏/4
3 ∏/4
5∏/4
None of these
The value of cos 1o cos 2o cos 3o .... cos 100o =
-b
If sin A = 4/5 and cos B = -12/13, where A and B tie in first and third quadrant respectively, then cos (A + B) is equal to
The maximum value of Sinθ Cosθ is
-1/2
1/2
The value of 1+ cos 56o + cos 58o - cos 66o is equal to
2 cos 28o cos 29o cos 33o
4 cos 28o cos 29o cos 33o
4 cos 28o cos 29o sin 33o
2 cos 28o cos 29o sin 33o
The value of Cos2 A ( 3-4 cos2 A)2 + sin2 A ( 3-4 sin2A)2 =
Cos 4 A
sin 4A
The expression tan2∝+ cot2 ∝ is
≥ 2
≤ 2
≥ -2
= 2
