trig equations

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Last updated 11:22 AM on 6/21/26
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18 Terms

1
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Sin²x + cos²x =

1

2
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Sinx / cosx =

Tanx

3
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Cotx =

1 / tanx

4
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Cosecx =

1 / sinx

5
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Secx =

1 / cosx

6
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Tan²x =

Sec²x - 1

7
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Cot²x =

Cosec²x - 1

8
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Sin2x =

2sinxcosx

9
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Cos2x

Cos²x - sin²x

10
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Cos2x =

1 - 2sin²x

11
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Cos2x =

2cos²x - 1

12
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Tan2x =

2tanx / 1 - tan²x

13
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Sin x + y =

Sinxcosy + cosxsiny

14
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sin x - y =

Sinxcosy - cosxsiny

15
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Cos x + y =

Cosxcosy - sinxsiny

16
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Cos x - y =

Cosxcosy + sinxsiny

17
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Tan x + y =

Tanx + tany /1 - tanxtany

18
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Tan x - y

Tanx - tany / 1 + tanxtany