The value of cos 15o - sin 15o is.
0
1/2
The value of cos2 α + cos 2 (α + 120o) + cos2 (α - 120o) is.
3/2
1
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
The general value of θ which satisfies tan θ = -1 and cos θ = 1/√2 the equations is
n π + 7 π/4
n π + (-1)n 7π/4
2 n π + 7 π/4
If cos θ = -1/2 and 0 < θ < 360o, then the values of θ are.
120o and 300o
60o and 120o
120o and 240o
60o and 240o
If sin θ = √3/2, the general value of θ is
2 n π ± π/6
2n π ± π/3
n π + (-1)n π/3
nπ +(-1)'' π/6
If θ =π/4, then 1+ tan 2 θ =
sin 2 θ
cot 2 θ
cosec2 θ
sec 2 θ
If x = a (sec θ + tan θ)2 and y = b (sec θ - tan θ)4, then the value of x4y2 is.
a2b4
a4b2
ab sec θ
a2b2 tan2 θ
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
If tan θ = t, then the value of tan 2 θ + sec 2θ is.
