Trigonometrie 2 Flashcards

1
Q

Tg(a + b)

A

(Tg a + tg b) / 1-tg a * tg b

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2
Q

Tg(a - b)

A

(Tg a - tg b) / 1 + tg a * tg b

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3
Q

Ctg (a + b)

A

(Ctg a * ctg b - 1) / ctg a + ctg b

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4
Q

Ctg (a - b)

A

(Ctg a * ctg b + 1) / ctg a - ctg b

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5
Q

Tg 2x

A

2tg x / 1 - tg^2 x

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6
Q

Ctg 2x

A

Ctg^2 x - 1 / 2 ctg x

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7
Q

Tg x/2

A

(1 + sin x )/ cos x

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8
Q

Ctg x/2

A

( 1 + cos x )/ sin x

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9
Q

Tg x + tg y

A

Sin (x + y) / cos x * cos y

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10
Q

Tg x - tg y

A

Sin (x - y) / cos x * cos y

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11
Q

Ctg x + ctg y

A

Sin (x + y) / sin x * sin y

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12
Q

Ctg x -ctg y

A

Sin (x - y) / sin x * sin y

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