Sin(x+y-z),sin(x+z-y),sin(z+y-x),, are in A.P. then prove that tanx ,tany ,tanz are in A.P.

Sin(x+y-z),sin(x+z-y),sin(z+y-x),, are in A.P. then prove that tanx ,t

1.	Sin(x+y-z),sin(x+z-y),sin(z+y-x),, are in A.P. then prove that tanx ,tany ,tanz are in A.P.
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