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Kehesg
@Kehesg
July 2022
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5ctg 1140°-2cos 750 ?
Полное решение .
Спасибо большое
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fmif09
Verified answer
5ctg 1140°-2cos 750°=
=5ctg (6*180°+60°) -2cos (2*360°+30°)=
=5ctg 60°-2cos 30°=
=5*✓3/3-2*✓3/2=
=5✓3/3 - ✓3= 2✓3 / 3
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Answers & Comments
Verified answer
5ctg 1140°-2cos 750°==5ctg (6*180°+60°) -2cos (2*360°+30°)=
=5ctg 60°-2cos 30°=
=5*✓3/3-2*✓3/2=
=5✓3/3 - ✓3= 2✓3 / 3