$$ {3tan^{2}30°}-{4\over 3}{sin^{2}60°}- {1\over2}{cosec^{2}45°}+{4\over3}{sin^{2}90°=?}$$

What is the value of $${\sqrt{1-cosA\over{1+cosA}}}$$?

If x+ y=90°, then what is  the value of $$ {\sqrt{cosx.cosecy-cosx.siny}}$$?

If $${secθ+tanθ\over secθ-tanθ}=2{51\over79}$$, then the value of sinθ is equal to:

If a=tanθ + 1 and b=sinθ+cosθ then find (b²-1)a=?

ΔPQR is right angled at Q. If cos P = 3/5, then what is the value of cos R?

If $$ {sin\ {θ}}={1\over {\sqrt{2}}}$$ then (tanθ+cosθ)=?

$$ {3sin60°-4sin^{3}60°=?}$$