Memory Test Review: Trig Formulas (3.1-3.12) Flashcards by Amber Walker | Brainscape

Q

Even Identity
cos(-x)=
sec(-x)=

A

cosx
secx

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Q

Odd Identity
sin(-x)=
csc(-x)=
tan(-x)=
cot(-x)=

A

-sinx
-cscx
-tanx
-cotx

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Q

1/cscx

A

sinx

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Q

1/sinx

A

cscx

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Q

1/cosx

A

secx

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Q

1/secx

A

cosx

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Q

1/tanx

A

cotx

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Q

1/cotx

A

tanx

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Q

sinx/cosx

A

tanx

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Q

cosx/sinx

A

cotx

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Q

sin^2x+cos^2x=

A

1

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Q

1+cot^2x=

A

csc^2x

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Q

1+tan^2x=

A

sec^2x

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Q

cos(90*-x)=

A

sinx

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Q

csc(90*-x)=

A

secx

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Q

cot(90*-x)=

A

tanx

Q

sin(x+y)=

A

sinxcosy+cosxsiny

Q

sin(x-y)=

A

sinxcosy-cosxsiny

Q

cos(x+y)=

A

cosxcosy-sinxsiny

Q

cos(x-y)=

A

cosxcosy+sinxsiny

Q

tan(x+y)= OMIT

A

(tanx+tany)/(1-tanxtany)

Q

tan(x-y)= OMIT

A

(tanx-tany)/(1+tanxtany)

Q

sin(2x)=

A

2sinxcosx

Q

cos^2x-sin^2x=

A

cos2x

Q

2cos^2x-1=

A

cos2x

Q

1-2sin^2x=

A

cos2x

Q

sin(x/2)=OMIT

A

plus or minus the square root of 1- cosx over 2

Q

cos(x/2)=OMIT

A

plus or minus the square root of 1 + cosx over 2

Q

tan (x/2)=OMIT

A

(1 - cosx)/sinx

Q

tan2x=OMIT

A

(2tanx)/(1-tan^2x)

Q

A