Trig Formulas Flashcards by him him | Brainscape

Q

sin²Ø = ?

A

1 - cos²Ø

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Q

sec²Ø =

A

1 + tan²Ø

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Q

csc²Ø =

A

1 + cot²Ø

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Q

sin(-Ø) =

cos(-Ø) =

tan(-Ø) =

A

-sin(Ø)

cos(Ø)

-tan(Ø)

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Q

(expansion)

sin(A + B) =

A

sinAcosB +sinBcosA

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Q

sin(A-B)

A

sinAcosB - sinBcosA

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Q

cos(a+b)

A

cosAcosB - sinAsinB

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Q

cos(a-b)

A

cosAcosB + sinAsinB

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Q

sin2Ø =

A

2sinØcosØ

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Q

cos2Ø

A

cos²Ø - sin²Ø = 2cos²Ø - 1 = 1 - 2sin²Ø

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