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 cos θ = -5/12 in which quadrant does θ lie ?
I quadrant
II quadrant
III quadrant
II or III
sin θ
-sin θ
cos θ
- cos θ
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 sin θ + cos θ =1 , the general value of θ is
2 n π
n π + (-1)n π/4 - π/4
2 n π+ π/2
n π+ π/2
If sin2 θ= 1/4, the general value of
2 n π ± (-1)n π/6
n π/2 ± (-1)'' π/6
n π± π/6
Sec2A + cosec2A =
(sec A+ cosec A)2
(secA-cosecA)2
sec2A. cosec2A
sec2A/cosec2A
Cosecθ = 1/_
Cosθ
Sinθ
tanθ
Cotθ
If tan θ = -1/ √3, sin θ = 1/2, cos θ = -√3/2 , the principal value of θ is
π/6
5π/6
7π/6
-π/6
If θ = 30o find the value of sin2θ + cos2θ
1
0
2
4
