Sin Flashcards

1
Q

Difference sin

A

Sin(a) cos(b) - sin(b) cos(a)

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2
Q

Two sin

A

2sin(a) cos(a)

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3
Q

Half sin

A

+/- (square root all this)

(1-cos(a))/2

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4
Q

Sum cos

A

Cos(a) cos(b) - sin(a) sin(b)

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5
Q

Difference cos

A

Cos(a) cos(b) + sin(a) sin(b)

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6
Q

Twice cos (original)

A

Cos^2(a) - sin^2(a)

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7
Q

Twice cos (cosine only)

A

2cos^2(a) -1

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8
Q

Twice cos (sine only)

A

1 - 2sin^2(a)

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9
Q

Half cos

A

+/- (square root all this)

(1 + cos(a))/2

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10
Q

Sum tan

A

Tan(a) + tan(b) / 1 - tan(a) tan(b)

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11
Q

Difference tan

A

Tan(a) - tan(b) / 1 + tan(a) tan(b)

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12
Q

Twice tan

A

2tan(a) / 1 - tan^2(a)

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13
Q

Half tan

A

+/- (square root all this)

1 - cos(a) / 1 + cos(a)

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14
Q

Sum of sin

A

Sin(a) cos(b) + sin(b) cos(a)

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