If 3 tan θ - 4 = 0 and 180° < θ < 270° then cosec θ = _______

If 1 + sin² A = 3 sin A cos A, then what are the possible values of tan A?

Find the value of $$ {\sqrt{(cos^{2}20°+cos^{2}70°)}}$$

If $$ {cot A={n\over{n+1}}}$$ and $$ {cot B={1\over{2n+1}}}$$ then what is the value of cot (A + B)?

If tanθ=1/5 then the value of Cosec²θ=?

If  $$ {cosAcotA \over( 1 - sinA ) }=x $$ then the value of x is : 

If cosec θ=1.25 then $$ {4 \ tanθ-5 \ cosθ + 1\over secθ+ 4cotθ-1}=?$$

If sec -5π/4 = x, then  the value   of x is