If in a triangle ABC, angle C=60 degree, then prove that
1/a+c + 1/b+c =3/a+b+c
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https://www.meritnation.com/ask-answer/question/in-triangle-abc-if-1-b-c-1-a-c-3-a-b-c-then-prove-t/trigonometric-functions/7157811
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