1) tg 420° + 2cos 870° – 2 cos 1410°;

Question

1) tg 420° + 2cos 870° – 2 cos 1410°;

Answer 1

Ответ будет:   -1.74295

Comments

haahhaha

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tg(360+80)+2cos(720+150)-2cos(1440-30)

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спасибо большое!

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tg80+2cos150-2cos30= tg(90-10)+2cos(90+60)-2*podkoren3/2

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dalwe tak