Trigonometry identities Flashcards by Thomas Scollay

Q

Cos^2x+Sin^2x =

A

1

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Q

Cos^2x=

A

1-Sin^2x

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Q

Sin^2x=

A

1-Cos^2x

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Q

Tanx=

A

Sinx/cosx

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Q

1/sinx=

A

cosec x

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Q

1/cosx=

A

sec x

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Q

1/tanx=

A

cot x

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Q

sec^2x=

A

1 + tan^2x

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Q

Cos2x=

A

Cos^2x-sin^2, 2cos^2x-1, 1-2sin^2x

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Q

Sin2x=

A

2cosxsinx

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