Triganometry Flashcards by Isobel Martin

Q

sin30

A

1/2

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Q

sin60

A

√3/2

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Q

sin45

A

1/√2

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Q

cos30

A

√3/2

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Q

cos60

A

1/2

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Q

cos45

A

1/√2

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Q

tan30

A

1/√3

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Q

tan60

A

√3

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Q

tan45

A

1

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Q

cosine rule

A

a^2 = b^2 + c^2bcosA

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Q

sine rule

A

a/sinA = b/sinB = c/sinC

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Q

area of non right angles triangles

A

1/2 x absinC

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Q

how often does a sin graph repeat

A

180

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Q

how often does a cos graph repeat

A

360

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Q

how often does tan graph repeat

A

180

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Q

sinx/cosx =

A

tanx

Q

sin^2x + cos^2x =

A

1

Q

sin^2x =

A

1 - cos^2x

Q

cos^2x =

A

1 - sin^2x

Q

sin^2x/cos^2x =

A

tan^2x

Q

1/tanx =

A

cosx/tanx

Q

sinx = sin(?)

A

180 - x

Q

cosx = cos(?)

A

360 - x

Q

tanx = tan(?)

A

x + 180

Q

sin2x

A

2sinxcosx

Q

cos2x

A

cos^2x - sin^2x OR
1 - 2sin^2x OR
2cos^2x - 1

Q

tan2x

A

2tanx / 1 - tan^2x

Q

1 + tan^2x

A

sec^2x

Q

1 + cot^2x

A

cosec^2x

Q

sin(a + b)

A

sinAcosB + cosAsinB

Q

sin(a - b)

A

sinAcosB - cosAsinB

Q

cos(a + b)

A

cosAcosB - sinAsinB

Q

cos(a - b)

A

cosAcosB + sinAsinB

Q

tan(a + b)

A

tanA + tanB /1 - tanAtanB

Q

tan(a - b)

A

tanA - tanB/ 1 + tanAtanB

Q

A