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if sec thita + tan thita=x find the value of sec thita
secthita+tanthita=x.......1
sec2thita-tan2thita=1
(secthita-tanthita)(secthita+tanthita)=1
(secthita-tanthita)x=1
secthita-tanthita=1/x......2
adding 1 and 2,
secthita+tanthita+secthita-tanthita=1+1/x
secthita=(x+1)/2x(Ans)
sec thita =x2+1/2x
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