1.

A : If cos (x-y) =3 cos ( x+y) " then " cot x - cot y=2 R : If (a)/(b)=(c)/(d) " then " (a+b)/(a-b)=(c+d)/(c-d)

Answer»

A is TRUE , R is true and R is correct EXPLANATION of A
A is true , R is TRUEAND R is not correct explanation of A
A is true , R is false
A is false , R is true

ANSWER :D


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