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arccos(sqrt2/2)-arcsin(-1)
arccos(-1/2)+arcsin(-1/2)
Главное решение.
arccos(sqrt2/2)-arcsin(-1)
arccos(-1/2)+arcsin(-1/2)
Главное решение.
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Answers & Comments
ARCSIN(-1/2)=-P/6
2P/3-P/6=P/2
1)P/4-(-P/2)=P/4+P/2=3P/4