The value of cos 15o is
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
1
None of these
(tan 7o) (tan 23o) (tan 60o)(tan 67o)(tan83o) is
0
7
√3
If sin θ + cos θ = m and sec θ + cosec θ = n, then n (m+1) (m-1) is equal to
m
n
2m
2n
The value of sin A sin (60o-A) sin (60o +A) is equal to
Sin 3 A
-1
The maximum value 3 cos θ + 4 sin θ is
3
4
5
The value of sin 20o sin 40o sin 60o sin 80o is equal to
-3/16
5/16
3/16
-5/16
The value of x for the maximum value of√3 cos x + sin x, is
30o
45o
60o
90o
