Trig Identities

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5 Terms

1
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sin2 (θ) + cos2 (θ) =

1 (Pythagorean Identities)

2
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tan2 (θ) + 1 =

sec2 (θ) (Pythagorean Identities)

3
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1 + cot2 (θ) =

csc2 (θ) (Pythagorean Identities)

4
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csc(θ) (Reciprocal Identity) =

1/sin(θ)

5
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sec(θ) (Reciprocal Identity) =

1/cos(θ)