Precalculus Trig indentities

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Pre-Calculus

AP Precalculus

Unit 3: Trigonometric and Polar Functions

Last updated 2:27 PM on 5/6/26

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12 Terms

1

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cscx

1/sinx

2

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secx

1/cosx

3

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cotx

1/tanx

4

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tanx

sinx/cosx

5

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cotx

cosx/sinx

6

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sin²x=

1-cos²x

7

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csc²x=

1+cot²x

8

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sec²x=

tan²x+1

9

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sin(2x)

2sinxcosx

10

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cos²x-sin²x

cos(2x)

11

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1-2sin²x

cos(2x)

12

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2cos²-1

cos(2x)