Trigonometric Identities

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sinx

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1/cscx

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cosx

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1/secx

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23 Terms

1

sinx

1/cscx

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2

cosx

1/secx

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3

tanx

1/cotx

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4

cscx

1/sinx

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5

secx

1/cosx

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6

cotx

1/tanx

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7

tanx

sinx/cosx

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8

cotx

cosx/sinx

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9

sin²x + cos²x

1

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10

sin²x

1 - cos²x

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11

cos²x

1 - sin²x

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12

1 + tan²x

sec²x

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13

tan²x

sec²x - 1

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14

1

sec²x - tan²x

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15

1 + cot²x

csc²x

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16

cot²x

csc²x - 1

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17

1

csc²x - cot²x

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18

sin(a + b)

sin a cos b + cos a sin b

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19

cos(a + b)

cos a cos b - sin a sin b

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20

sin(a - b)

sin a cos b - cos a sin b

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21

cos(a - b)

cos a cos b + sin a sin b

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22

sin(2u)

2 sin u cos u

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23

cos(2u)

cos²u - sin²u

2cos²u - 1

1 - 2sin²u

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