____________=1+tan²θ

If cos θ  = -5/12 in which quadrant does θ lie ?

If tan θ = -1/ √3, sin θ = 1/2, cos θ = -√3/2 , the principal value of θ is

1 - cos²θ - sin²θ = ___________

The general solution of sinx - 3 sin 2x+ sin 3x= cosx -3 cos2x + cos 3 x  is

If θ =π/4, then 1+ tan ² θ =

tanθ tan(90-θ)= ___________

Cos⁴ A- sin⁴A=

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

Cos (-1760⁰) =