trignometric identities Flashcards

(20 cards)

1
Q

sin^2 θ + cos^2 θ =

A

1

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2
Q

1+ tan^2 θ =

A

sec^2 θ

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3
Q

1 + cot^2 θ =

A

csc^2 θ

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4
Q

sin^2 θ =

A

1 - cos^2 θ

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5
Q

cos^2 θ =

A

1 - sin^2 θ

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6
Q

tan^2 θ =

A

sec^2 θ - 1

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6
Q

sec^2 θ - tan^2 θ =

A

1

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7
Q

cot^2 θ =

A

csc^2 θ - 1

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8
Q

csc^2 θ - cot^2 θ =

A

1

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9
Q

sin2θ =

A

2.sinθ.cosθ

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10
Q

cos2θ =

A

1 - 2.sin^2 θ

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11
Q

tan 2θ =

A

2 tanθ / 1 - tan^2 θ

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12
Q

sin(-θ) =

A

-sinθ

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13
Q

cos(-θ) =

A

+ cosθ

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14
Q

tan (-θ) =

A

-tanθ

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15
Q

csc(-θ) =