Wiskunde - formules toets 30/1 (6 goniometrie) Flashcards

a = alpa en B = beta !!

1
Q

cos(a-B)

A

cos a . cos B + sin a . sin B

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2
Q

cos(a+B)

A

cos a . cos B - sin a . sin B

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3
Q

sin(a-B)

A

sin a . cos B - cos a . sin B

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4
Q

sin(a+B)

A

sin a . cos B + cos a . sin B

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5
Q

tan(a-B)

A

1+tan a . tan B

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6
Q

tan(a+B)

A

1-tan a . tan B

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7
Q

Hoe heten de formules met 2a?

A

formules voor de dubbele hoek

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8
Q

sin 2a

A

2 sin a . cos a

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9
Q

cos 2a

A

= cos²a - sin²a
= 1 - 2 sin²a
= 2 cos²a - 1

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10
Q

tan 2a

A

1-tan²a

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11
Q

Hoe heten de formules met sin en cos die als hoeken x en y hebben?

A

de formules van Simpson

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12
Q

sin x + sin y

A

2 sin x+y/2 . cos x-y/2

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13
Q

sin x - sin y

A

2 cos x+y/2 . sin x-y/2

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14
Q

cos x + cos y

A

2 cos x+y/2 . cos x-y/2

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15
Q

cos x - cos y

A

-2 sin x+y/2 . sin x-y/2

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