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以下の青線の答えがどうしても45／4になってしまいます。どう計算すれば10... - Yahoo!知恵袋
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![If A+B+C=Π , then prove that Sin(B+2C) + Sin(C+2A) + Sin(A+2B)=4Sin[(B-C)/2] . Sin[(C-A)/2] . Sin[(A-B)/2]](https://mypat-community-images-prod.s3-us-west-2.amazonaws.com/web/5ace602f9fe7b01d581e2e4e1528982073986.Capture.PNG "If A+B+C=Π , then prove that Sin(B+2C) + Sin(C+2A) + Sin(A+2B)=4Sin[(B-C)/2] . Sin[(C-A)/2] . Sin[(A-B)/2]")
If A+B+C=Π , then prove that Sin(B+2C) + Sin(C+2A) + Sin(A+2B)=4Sin[(B-C)/2] . Sin[(C-A)/2] . Sin[(A-B)/2]
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三角比についてです。次の問題について教えてください。AB=5，AC=6，sin... - Yahoo!知恵袋
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5. If \tan A+\frac{1}{\tan A}=2, find the value
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In a Δ ABC, right angled at A, if AB = 5, AC = 12 and BC 13, find sin B, cos C and tan B.
In the triangle ABC right-angled at B, if tan A = 1/√3 find the value of: (i) sin A cos C + cos A sin C (ii) cos A cos C -
