Формулы двойного угла Flashcards by Peter Timofeev | Brainscape

Q

sin2A=

A

2sinAcosA

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Q

cos2A=

A

cos^2A-sin^2A

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Q

cos2A=

A

1-2sin^2A

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Q

tg2A=

A

2tgA/1-tg^2A

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Q

ctg2A=

A

ctg^2A-/2ctgA

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