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PriyanshuToday, 16:05 |
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Answer» p²-1= (secx +tanx)^2-1 sec^2x +tan^2x +2tanxsecx -1 subs 1= sec^2x -tan^2x sec^2x+tan^2x +2tanxsecx-sec²x +tan^2x 2tan^2x + 2tanx secx=2tanx (secx+tanx) p^2+1= sec^2x+tan^2x +2tanxsecx +sec^2x-tan^2x p^2+1 = 2sec^2x+2tanxsecx =2secx(secx+tanx) (p^2-1)/(p^2+1)= 2tanx /2secx= sinx |
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