1.

If the line jjoining the point A (b cos alpha,b sin alpha)and B (alpha cosbeta,asin beta) is extended to the point N(x,y) such that AN : NB =b: alpha,then

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Option1`" xcos"(alpha-beta)/(2)+ " y SIN" (alpha+beta)/(2)=0`
OPTION2`" xcos"(alpha-beta)/(2)+ " y sin" (alpha-beta)/(2)=0`
OPTION3`" xcos" (alpha-beta)/(2)+ " ysin"(alpha+beta)/(2)=0`
Option4`" xcos" (alpha+beta)/(2)+ " ysin"(alpha+beta)/(2)=0`

Answer :C


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