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यदि (sintheta)/(x)=(costheta)/(y), है त...

यदि `(sintheta)/(x)=(costheta)/(y)`, है तो `sintheta-costheta` किसके बराबर है?

A

`x-y`

B

`x+y`

C

`(x-y)/(sqrt(x^(2)+y^(2)))`

D

`(y-x)/(sqrt(x^(2)+y^(2)))`

लिखित उत्तर

Verified by Experts

The correct Answer is:
c

`(sin theta)/(x)=(cos theta)/(y)=(1)/(k)`
`rArrx=ksin theta`
`rArry=k cos theta`
`rArrx^(2)+y^(2)=k^(2)(sin^(2)theta+cos^(2)theta)=k^(2)`
`rArrk=sqrt(x^(2)+y^(2))`
`therefore sin theta-cos theta`
`(x)/(k)-(y)/(k)=(x-y)/(k)`
`rArr(x-y)/(sqrt(x^(2)+y^(2)))`
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