If \[{{e}^{x}}=y+\sqrt{1+{{y}^{2}}}\], then y = [MNR 1990, UPSEAT 2000

1.	If \[{{e}^{x}}=y+\sqrt{1+{{y}^{2}}}\], then y = [MNR 1990, UPSEAT 2000]
A.	\[\frac{{{e}^{x}}+{{e}^{-x}}}{2}\]
B.	\[\frac{{{e}^{x}}-{{e}^{-x}}}{2}\]
C.	\[{{e}^{x}}+{{e}^{-x}}\]
D.	\[{{e}^{x}}-{{e}^{-x}}\]
Answer» C. \[{{e}^{x}}+{{e}^{-x}}\]

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If \[{{e}^{x}}=y+\sqrt{1+{{y}^{2}}}\], then y = [MNR 1990, UPSEAT 2000]

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