som en verchil formules Flashcards

1
Q

cos(α - β)

A

cosα ×cosβ + sinα ×sinβ

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2
Q

cos(α + β)

A

cosα ×cosβ - sinα ×sinβ

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3
Q

sin(α - β)

A

sinα ×cosβ - cosα ×sinβ

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4
Q

sin(α + β)

A

sinα ×cosβ + cosα ×sinβ

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5
Q

tan(α - β)

A

(tanα - tanβ) / (1 + tanα×tanβ)

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6
Q

tan(α + β)

A

(tanα + tanβ) / (1 - tanα×tanβ)

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