`(1-sintheta)(1+sintheta)(1+sin^2theta)=?`

For pi/2

Find the value of sqrt((1-sintheta)/(1+sintheta))+sqrt((1+sintheta)/(1-sintheta)) .

If 0^(@)lethetale90^(@) , then solve the following equations : (i) (costheta)/(1-sintheta)+(costheta)/(1+sintheta)=4 (ii) (cos^(2)theta-3costheta+2)/(sin^(2)theta)=1 (iii) (costheta)/("cosec"theta+1)+(costheta)/("cosec"theta-1)=2

Simplify: (1+tan^(2)theta)(1-sintheta)(1+sintheta)

Smlplify : (1+tan^(2)theta)(1-sintheta)(1+sintheta)

If (costheta)/(1+sintheta)+(costheta)/(1-sintheta)=2sqrt(2) and theta is acute , then what is the value (in degrees ) of theta ?

If Delta=|{:(1,sintheta,1),(-sintheta,1,sintheta),(-1,-sintheta,1):}|"prove that" 2lt=Deltalt=4.