1+tan2θ =
cos2θ
sec2θ
cosec2θ
cot2θ
The general solution of sinx - 3 sin 2x+ sin 3x= cosx -3 cos2x + cos 3 x is
n π+ π/8
n π/2+ π/8
(-1)n(nπ/2)+π/8
2nπ+cos-1 (3/2)
If θ = 30o find the value of sin2θ + cos2θ
1
0
2
4
Sin 90o =
∞
None
If sec2 θ = 4/3, the general value of θ is
2 n π ± π/6
n π ± π/6
2 n π ± π/3
n π ± π/3
If 2 cos2x + 3 sin x -3 = 0, 0≤ x,≤1800, then x =
300, 900,1500
600,1200,1800
00,300,1500
450, 900,1350
1 - cos2θ - sin2θ =
3
The minimum value of 5 sin 2 θ + 4 cos 2 θ is
(1+ tanA)2 + (1-tanA)2 =
sec2A
secA
2sec2A
Cos (-17600) =
-0.7660
0.7660