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mady112003
@mady112003
June 2022
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Известно , что ΔABC AB = 2 см , AC = 3 см ,∠BAC = 30 ° Користуючись теоремою синусив BC²=AB²+AC ²- 2AB×AC cosA
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studentvv
BC²=AB²+AC ²- 2AB×AC cosA
BC²= 4+ 9-2×2×3×√3/2 = √3/2
3 votes
Thanks 1
mady112003
спасибо )
studentvv
Незачто)))
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Answers & Comments
BC²= 4+ 9-2×2×3×√3/2 = √3/2