If `piltthetalt 2pi, then sqrt((1+costheta)/(1-costheta))` is equal to

If pi le theta le (3pi)/2 , then sqrt((1+cos theta)/(1-costheta))+sqrt((1-costheta)/(1+costheta)) is equal to :

sqrt(1-cos^2theta)/(costheta) = ……………..

If cottheta=3/4 , then the value of sqrt((1+costheta)/(1-costheta)) is:

sqrt((cottheta+costheta)/(cottheta-costheta)) is equal to :

What is lim_(thetato0)(sqrt(1-costheta))/(theta) equal to?

What is sintheta/(1+costheta)+(1+costheta)/sintheta equal to ?