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Sum and Double Angle Formulas

8 flashcardsby emma

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1

sin (a+b)

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

2

cos (a+b)

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

3

sin (a-b)

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

4

cos (a-b)

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

5

tan (a+b)

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

6

tan (a-b)

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

7

sin (2a)

2 x sin(a) x cos(a)

8

cos (2a)

(cos(a))^2 -(sin(a))^2

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