$$ {tan7°tan23°tan60°tan67°tan83°}$$ is equal to-

Find the minimum value of $$ {25 cosec^{2}θ +25sin^{2}θ}$$

If $$ {sin\ θ\ cosec\  θ\over tan θ}=4 $$  then Find the value of tan θ ?

If a(tanθ+cotθ)=1, sinθ+cosθ=b and 0°<θ<90°, then the relation between a and b.

What is the value of $$ {cosecθ\sqrt{1-cos^2θ}}$$.

If tan $$ -{7π\over4}=x $$ then the value of x is : 

The value of $$ {2(1-sin^{2}θ)}+{2(1-cos^{2}θ)}$$. 

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