1.

If cos(x+pi//3)+cosx=a has real solutions, then

Answer»

a NUMBER of integral values of a is 3
sum of number of integral values of a is 0.
when a=1, number of SOLUTIONS for `X in [0,2pi[` are 3
when a=1, number of solutions for `x in [0,2pi]` are 2

Answer :A::B::D


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