The value of $$(x^{b+c})^{b-c}. (x^{c+a})^{c-a}.(x^{a+b})^{a-b}$$ when (x≠0).

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

A tower standing on a horizontal plane subtends a certain angle at a point 160 m apart from the foot of the tower. On advancing 100 m towards it, the tower is found to subtend and angle twice as before. The height of the tower is

The value of $$ sec{^4}A(1-sin{^4}A)-2tan{^2}A $$ is:

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

In the given figure BC=15 cm and Sin B=4/5.  then find out the value of AB?