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Prove that, ( 1-tan^2A) / (cot^2A-1) = t...

Prove that, `( 1-tan^2A) / (cot^2A-1) = tan^2A`

Text Solution

Verified by Experts

The correct Answer is:
A, B, D
Using property of angle bisector, we get
`(OB)/(AB)=(OC)/(AC)rArr sectheta/tantheta=x/(1-x)`
`or x=sectheta/(sectheta+tantheta)`
`xsectheta(sectheta-tantheta)=1/(1+sintheta)`
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