Question Number 114988 by ZiYangLee last updated on 22/Sep/20

Prove tan^2 x=sin^2 x+sec^2 x

Answered by Olaf last updated on 22/Sep/20

It′s false sir.  tan^2 x ≠ sin^2 x+sec^2 x

Commented byZiYangLee last updated on 22/Sep/20

Ok sir tks

Answered by Olaf last updated on 22/Sep/20

But tan^2 x = ((sin^2 x)/(cos^2 x)) = sin^2 x((1/(cosx)))^2 = sin^2 x×sec^2 x  It′s × not +