Ответ:
х²=2²+4²-2·2·4·соs30°=4+16-16·(√3/2)=20-8√3≈6,14...
х=√6,14..≈2,48
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Ответ:
х²=2²+4²-2·2·4·соs30°=4+16-16·(√3/2)=20-8√3≈6,14...
х=√6,14..≈2,48