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A: In a Delta ABC, if A,B,C are in A.P. and triangle is equilateral cos A+2 cos B+ cos C=2 R: In a Delta ABC, if A,B,C are in A.P. and cos A+ cos B+ cos C=2 then the triangle is isosceles.

Answer»

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

Answer :C


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