Trig Equations & Identities

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13 Terms

1
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sin²a + cos²a =

1

2
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sin (π-a) =

sin a

3
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cos (π-a) =

-cos a

4
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tan (π-a) =

-tan a

5
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sin (a+π)=

-sin a

6
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cos (a+π) =

-cos a

7
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tan (a+π) =

tan a

8
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sin(-a) =

-sin a

9
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cos (-a) =

cos a

10
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tan (-a) =

-tan a

11
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sin (π/2 + a) =

cos a

12
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cos (π/2 + a) =

-sin a

13
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tan (π/2 + a) =

-tan a