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basic trigo

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Printed Date: 07Feb2025 at 3:03pm


Topic: basic trigo
Posted By: shilpa123
Subject: basic trigo
Date Posted: 21Aug2007 at 10:50pm
to prove: {1-cos A + cos B -cos(A+B)} /{1+cos A - cosB - cos(A+B) }
              =(tanA/2 cotA/2)


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