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זהויות טריגונומטריות

16 flashcardsby Michael

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1

Sin(2a)

2sin(a)cos(a)

2

Cos(2a)

cos²(a)-sin²(a)
2cos²a-1
1-2sin²a

3

tg(2a)

2tg(a)
----------
1-tg²(a)

4

sin(a+b)

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

5

sin(a-b)

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

6

cos(a+b)

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

7

cos(a-b)

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

8

tg(a+b)

tg(a)+tg(b)
-------------------
1-tg(a)tg(b)

9

tg(a-b)

tg(a)-tg(b)
-------------------
1+tg(a)tg(b)

10

sin(a)

sin(180-a) / cos(90-a)

11

cos(a)

sin(90-a)

12

tg(a)

sin(a)
----------
cos(a)

13

sin²(a)

1-cos²(a)

14

cos²(a)

1+cos(2x)
----------
2

15

cos²(a)+sin²(a)

1

16

sin²x

1-cos(2x)
----------
2

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