Hai góc phụ nhau Flashcards by Võ Nguyễn Chí Thành | Brainscape

Q

sin(π/2-a)

A

cosa

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Q

cos(π/2-a)

A

sina

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Q

tan(π/2-a)

A

cota

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Q

cot(π/2-a)

A

tana

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