1.

यदि `2sin((pix)/(2))=x^(2)+(1)/(x^(2))` है तो `(x-(1)/(x))` का मान ज्ञात करे?A. `-1`B. `2`C. `1`D. 2

Answer» Correct Answer - d
`2 sin [(pi x)/(2)]=x^(2)=(1)/(x^(2))`
Let x=1
`2 sin90=1^(2)+(1)/(1 ^(2))`
`2xx1=1+1`
2-2 matched so x=3
so, `x-(1)/(x)`
`rArr1-(1)/(1)=0`


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