Review Notes - 2018-19 Ms. Passant's Classroom webpage · Lesson 3-6: Review of Right Angled...
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Transcript of Review Notes - 2018-19 Ms. Passant's Classroom webpage · Lesson 3-6: Review of Right Angled...
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![sms.math.nus.edu.sg...By (3), we have the relation cosA cosB cosC = 4~2 [5 2-(2R + r)]. Therefore ABC is an acute-angled triangle, a right-angled triangle, or an obtuse-angled triangle](https://static.fdocuments.us/doc/165x107/5eb289e00225fb34fd7f64c2/smsmathnusedusg-by-3-we-have-the-relation-cosa-cosb-cosc-42-5-2-2r.jpg)
