'Bc sin' diaporamas de présentation

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?????????????. ????. 1. ????????? ( R ? ? ABC ?????? ). b 2 + c 2 -2 bc cos A. a 2 + c 2 -2 ac cos B. a 2 + b 2 -2 ab cos C. 2 R sin A. 2 R sin B. 2 R sin C. sin A ? sin B ? sin C. ??. ??????. ?????????. ??. ????????. ??????????. ????????. ?????????. ??. ??. ??. ??.

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??? ??????. 3-1 ???? 3-2 ???? 3-3 ?????? 3-4 ????. ????. 3-1 ?????. 1. ?????????? 2. ???? 3. ???????? 1 4. ???????? 2 5. ???????? 3. ? ? ABC ?????? A ?? B ?? C ?????? a ? b ? c ???? 2. R ? ? ABC ?????? 3. r ? ? ABC ?????? 4. s ? ? ABC ??????? s = ?.

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9.5 Apply the Law of Sines day 3

9.5 Apply the Law of Sines day 3. How do you use the law of sines to find the area of a triangle?. Find the Area of a Triangle. When you know the lengths of two sides and the measure of the included angles, you can find the area of a triangle.

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Warm-Up 5/29/13

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