1.

If a_(1)Cos theta+b_(1) Sin theta+c_(1)=0 and a_(2) cos theta+ b_(2) sin theta +c_(2)= 0 then (b_(1)c_(2)-b_(2)c_(1))^(2)+(c_(1)a_(2)-c_(2)a_(1))^(2)=

Answer»

`(a_(1)b_(2)-a_(2)b_(1))^(2)`
`(a_(2)b_(2)-a_(2)b_(1))^(2)`
`(c_(1)-c_(2))^(2)`
`(b_(2)c_(2)-b_(1)c_(1))^(2)`

ANSWER :A


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