Trig identities Flashcards by Nina Richardson

Q

1 + cot^2A

A

Cosec^2A

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Q

Tan^2A + 1

A

Sec^2A

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Q

Sin(A +/- B)

A

SinACosB +/- CosASinB

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Q

Cos(A +/- B)

A

CosACosB -/+ SinASinB

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Q

Tan(A +/- B)

A

TanA +/- TanB / 1 -/+ TanATanB

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Q

Sin2A

A

2SinACosA

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Q

Cos2A

A

Cos^2A - Sin^2A = 1 - 2Sin^2A = 2Cos^2A - 1

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