Double Angles Flashcards

1
Q

sin2A

A

2sinAcosA

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2
Q

sin2A In terms of tangent

A

2tanA
1 + tan²A

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3
Q

cos2A

A

cos²A - sin²A

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4
Q

cos2A In terms of sines

A

1 - 2sin²A

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5
Q

cos2A In terms of cosines

A

2cos²A - 1

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6
Q

1 - cos2A

A

2sin²A

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7
Q

1 + cos2A

A

2cos²A

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8
Q

cos2A In terms of tangent

A

1 - tan²A
1 + tan²A

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9
Q

tan2A

A

2tanA
1 - tan²A

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10
Q

cos2A In terms of tangent

A

1 - tan²A
1 + tan²A

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