1.

The normal at a poitn P( theta)on the ellipse 5x^(2) +14y^(2)=70cuts the curve again at a point Q(2theta)then"cos" theta

Answer»

A) ` (1)/(3) `
B) ` -(1)/(3) `
C) ` ( 2)/(3) `
D) ` ( -2)/(3) `

ANSWER :B


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