In \( \triangle A B C, A=\frac{2 \pi}{3}, b-c=3 \sqrt{3} \mathrm{~c... VIDEO
In \( \triangle A B C, A=\frac{2 \pi}{3}, b-c=3 \sqrt{3} \mathrm{~cm} \) and area of \( \triangle A B C \)https://bit.ly/YTAI_PWAP https://www.pw.live
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\( x \sin a+y \sin 2 a+z \sin 3 a=\...
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