Mathematics
Senior High

線を引いたところの、cosAの値をsinAに直す方法(式)が分かりません!教えてください

=) ² AS 251 (1) 余弦定理から cos A - 6²+7²-321 = 2.6.7 76 2.6.7 sin A>0であるから = 19 21 sin A =√1-cos² A = (880 4√5 21 441 19

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