1.Line through P(α,β)P(\alpha,\beta)P(α,β) cuts x2+y2=r2x^2+y^2=r^2x2+y2=r2 at A,BA,BA,B. Then PA⋅PB=PA\cdot PB=PA⋅PB=a.(α+β)2−r2(\alpha+\beta)^2-r^2(α+β)2−r2b.α2+β2−r2\alpha^2+\beta^2-r^2α2+β2−r2c.(α−β)2+r2(\alpha-\beta)^2+r^2(α−β)2+r2d.NoneLogin to continueOnly logged in users canattempt or see the solution.
