please solve this problem. ...
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Answer:
(tan © + sec © + 1)(tan © + sec© - 1)
= ((tan© + sec©)^2 - 1)
= ( tan^2 © + sec^2 © + 2tan © sec © - 1)
= 2tan^2 © + 2tan ©sec©
= 2tan © ( tan © + sec ©)
= [2 sin / cos ]( sin + 1 / cos )
= 2 sin ( 1+ sin)/cos ^2
= 2 sin (1+sin)/(1-sin^2)
= 2 sin ( 1+ sin) / (1+sin)(1-sin)
= 2 sin / 1- sin
Hence proved.
Hope this helps you !
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