If cos a = (cos u -e)/(1-ecos u)Then prove thatTan a /2 ={√(t+e)/(1-e)}*tan u/2

If cos a = (cos u -e)/(1-ecos u)Then prove thatTan a /2 ={√(t+e)/(1-

1.	If cos a = (cos u -e)/(1-ecos u)Then prove thatTan a /2 ={√(t+e)/(1-e)}*tan u/2
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