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In triangle ABC,angleC=(2pi)/3 and CD i...

In triangle `ABC,angleC=(2pi)/3 and CD` is the internal angle bisector of `angleC` meeting the side `AB` at `D.` If Length `CD` is `1,` then H.M. of `a and b` is equal to : (a) `1` (b) `2` (c) `3` (d) `4`

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