Delhi Public School, RK Puram
Period T of function y=cos(nx)
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doubt from conservation of momentum
Relation between a, b,c and d are so that ay^2+bxy+cx+dy=0 represents pair of straight lines. A) c=0 ;B) a=0 ; C) ad-bc=0 ; D) ac-bd=0 .The answer should be a) and d) ..Please help.
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