Coordinate geometry

Asked by abhishekxavier | 19th Dec, 2009, 03:09: PM

Expert Answer:

Distance between (cosα,-sinα) and (-cosα,sinα)  is [(2cos α)2+(2sin α)2 ] =2 cos2 α+sin2 α  =2

 

Answered by  | 19th Dec, 2009, 03:50: PM

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