If equation (A-B)  =  , then the value of (1+ tan A)  ( 1 + tan B) is.

____________=1+tan²θ

Cosecθ = 1/_

If P_n  = cosⁿθ  + sinⁿ θ , then the value of 2P₆ - 3P₄  + 1 is.

If sin θ = √3 cos θ, - π < θ

If sin²x - 2 cosx+ 1/4=0, the general solution x is

If √3 sec θ +2 = 0 , the general value of θ is

If sin²θ- cosθ= 1/4, 0≤ θ ≤ θ 2 π, the value of θ is.

If  0  ≤  θ  ≤     and 81 ^_sin2_θ   + 81 ^_cos2_θ   =30, then value of θ is.