solve
`{(1+sintheta)(1-sintheta)}/{(1+costheta)(1-costheta)}=?`

If cot theta= (7)/(8) then the value of ((1+ sintheta)(1-sintheta))/((1+costheta)(1-costheta)) = …………….

(1+costheta)/(sintheta)=?

((1-sintheta+costheta)^(2))/((1+costheta)(1-sintheta))=?

If alpha, beta are roots of x^2 sintheta-(costhetasintheta+1)x+xcostheta=0 where alphaltbeta and thetaepsilon(0,pi//4) then value of sum_(n=0)^oo(alpha^n +((-1)^n)/beta^n) (A) (1-costheta)/(sintheta)+(1-sintheta)/(costheta) (B) 1/(1+costheta)+1/(1-sintheta) (C) 1/(1-costheta)+1/(1-sintheta) (D) 1/(1-costheta)-1/(1+sintheta)

Evaluate : (( 1 + sintheta ) ( 1 - sintheta )) / ( ( costheta ) ( - costheta ) )

Prove that : (1-costheta)/(sintheta)+(sintheta)/(1-costheta)=2"cosec "theta

If : (1+sintheta)/(1+costheta)+(1-sintheta)/(1-costheta)=2u.(csctheta-costheta),"then" : u =

Prove that : (i) (1-cosA)/(sinA)=(sinA)/(1+cosA) (ii) (costheta)/(1-sintheta)=(1+sintheta)/(costheta)

Prove that : (1+sintheta)/(costheta)+(costheta)/(1+sintheta)=2sectheta

Prove that : (sintheta)/(1+costheta)+(1+costheta)/(sintheta)=2"cosec"theta