calculater

From: "daohuong" <daohuong08@xxxxxxxxx>
To: <smcc@xxxxxxxxxxxxx>
Date: Fri, 28 Oct 2005 20:45:37 +0700

Chao cac anh chi! Em co mot thac mac khi su dung calculater: khi biet sin, 
cos,... cua mot goc nao do, muon tra goc do bang bao nhieu do thi phai lam the 
nao a? Em cam on cac anh chi nhieu!

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