1 Answers
govind
·2010-02-21 20:54:28
this is a simple one ..write cosA = (1 - tan2 A/2)/(1 + tan2A/2)
and sinA = 2tanA/2/(1 + tan2A/2)
sry neither image uploader nor latex working...otherwise i wud have posted the solution..
substitute the abv values..u will get the answer