Prove that `1/(sectheta-tantheta)+1/(sectheta+tantheta)=2sectheta`

(sectheta+tantheta-1)(sectheta-tantheta+1)=

Prove that : (i) (1)/(sectheta-tantheta)+(1)/(sectheta+tantheta)=2sectheta " " (ii) ("cosec "theta+cottheta)/("cosec "theta-cottheta)=("cosec "theta+cottheta)^(2)

Prove that (1+sectheta-tantheta)/(1+sectheta+tantheta) = (1-sintheta)/(costheta)

Prove that- (sectheta+tantheta-1)/(1-sectheta+tantheta)=(1+sintheta)/costheta

Pove that- sectheta-tantheta=1/(sectheta+tantheta)=(1-sintheta)/costheta

(tantheta/sectheta)=

tantheta-tantheta/2=sectheta/2

Prove that- (1+sintheta)/(1-sintheta)= (sectheta+tantheta)^2

Prove that- (sectheta+tantheta)/(sec-tantheta)=((1+sintheta)/costheta)^2

(tantheta-sectheta)^2