If sin^{2}x - 2 cosx+ 1/4=0, the general solution x is

2n π ± π/3

2 n π± π/4

2 n π ± π/3

n π ± π/3

Cosecθ = 1/_

Cosθ

Sinθ

tanθ

Cotθ

If tan θ = t, then the value of tan 2 θ + sec 2θ is.

tan(180-θ) = ____________

0

1

-1

none

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

tan 211^{o} =_______

-0.6009

0.9006

0.6009

-0.9006

If sec 4 θ - sec 2 θ = 2, the general value of θ is

(2 n+1) π/4

(2n+1) π/10

n π + π/2 or 2nπ/5 + π/10

n π + π/5

The solutions set of the equation(2 cosx -1) (3+2 cosx ) =0 in the interval o ≤ r ≤ 2 Π is

-5π/3.

5π/3.

3π/5.

π/3

If θ = 30^{o} find the value of sin^{2}θ + cos^{2}θ

2

4

Thevalue of 1^{o}× cos 2^{o} × cos 3^{o} × ... × cos 179^{o} is.

^{1}/_{2}