Trig Flashcards by Chloe Harris

Q

tanx

A

sinx/cosx

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Q

cos²x + sin²x

A

1

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Q

cotx

A

cosx/sinx

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Q

sec²x

A

tan²x + 1

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Q

cosec²x

A

cot²x + 1

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Q

sin2x

A

2sinxcosx

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Q

cos2x

A

cos²x - sin²x
2cos²x - 1
1 - 2sin²x

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Q

tan2x

A

(2tanx)/(1 - tan²x)

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Q

sin2x

A

2sinxcosx

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Q

cos2x

A

cos²x-sin²x
2cos²x-1
1-2sin²x

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Q

tan2x

A

(2tanx)/(1-tan²x)

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Q

cos(-B) =

A

cos(B)

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Q

sin(-B) =

A

-sin(B)

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