Trig identities

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8 Terms

1
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csc(x) =

1/sin(x) =

2
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sec(x) =

1/cos(x) =

3
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cot(x) =

1/tan(x)

4
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sec2(x) =

1 + tan2(x) =

5
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csc2(x) =

1 + cot2(x) =

6
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sin(x/2) =

±√(1 - cos(x)/2)

7
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cos(x/2) =

±√(1+cos(x)/2)

8
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tan(x/2) =

1 - cos(x)/sin(x) =