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If asecθ+btanθ+c= 0 and psecθ+qtanθ+r= 0 then (br-qc)2 – (pc-ar)2= ?

a) (aq-bp)2
b) (ap-bq)2
c) (aq+bp)2
d) (aq-bp)3

Admin Answered question 2018-10-14