If θ = 30o find the value of sin2θ + cos2θ
1
0
2
4
Sec2A + cosec2A =
(sec A+ cosec A)2
(secA-cosecA)2
sec2A. cosec2A
sec2A/cosec2A
sin θ
-sin θ
cos θ
- cos θ
Cos4 A- sin4A=
(cos2A-sin2A)2
(cos2A+ sin2A)
1-2 sin2A
1-2 cos2A
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 sin2θ- cosθ= 1/4, 0≤ θ ≤ θ 2 π, the value of θ is.
2π/3, π/3
π/3, 5π/3
- π/3, 2π/3
- 2π/3, 5π/3
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
tanθ tan(90-θ)= ___________
3
It θ = 30 0 then sin 2 θ + cos 2 θ =
Sinθ*cosecθ = ____________
180
none
