Trig Flashcards by Max Kessler | Brainscape

Q

sin2x =

A

2 sinx cosx

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Q

cos2x =

A

1 – 2sin²x

cos²x – sin²x

2cos²x – 1

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Q

sin²x + cos^{<span>2</span>}x =

A

1

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Q

1 + tan²x =

A

sec²x

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Q

1 + cot²x =

A

csc²x

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Q

cos²x =

sin²x =

A

1/2 ( 1 + cos2x )

1/2 ( 1 – cos2x )

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Q

sin(u + v)

sin(u – v)

A

sinu•cosv + cosu•sinv

sinu•cosv – cosu•sinv

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Q

cos(u + v)

cos(u – v)

A

cosu•cosv – sinu•sinv

cosu•cosv + sinu•sinv

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