Trigonometric Identities Flashcards by Miraj Ali | Brainscape

Q

tan(x)

A

sin(x)/cos(x)

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Q

cot(X)

A

cos(x)/sin(x)

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Q

Pythagorean Identities

A

sin²x+cos²x=1
1+tan²=sec²x
1+cot²x=csc²x

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Q

Reciprocal Identities

A

1/sinx=cscx
1/cosx=secx
1/tanx=cotx

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Q

sin2x?

A

2sinxcosx

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Q

cos2x?

A

cos²x-sin²x
1-2sin²x
2cos²x-1

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Q

tan2x?

A

2tanx/1-tan²x

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