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Flashcards of trigonometric identities
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csc θ =
1 / sin θ
sec θ =
1 / cos θ
tan θ =
sin θ / cos θ
cot θ =
cos θ / sin θ
cos²θ + sin²θ =
1
1 - cos²θ =
sin²θ
1 - sin²θ =
cos²θ
1 + tan²θ =
sec²θ
sec²θ - 1 =
tan²θ
1 - sec²θ =
- tan²θ
1 + cot²θ =
csc²θ
csc²θ - 1 =
cot²θ
1 - csc²θ =
-cot²θ
cot θ =
1/ tan θ
csc θ =
1/sin θ
tan θ =
1/ cot θ
sin θ =
1/csc θ