Trigonometric Identities Flashcards

1
Q

Reciprocal Identities

cscx

A

1/sinx

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2
Q

Reciprocal Identities

tanx

A

1/cotx

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3
Q

Reciprocal Identities

sinx

A

1/cscx

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4
Q

Reciprocal Identities

cosx

A

1/secx

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5
Q

Reciprocal Identities

secx

A

1/cosx

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6
Q

Reciprocal Identities

cotx

A

1/tanx

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7
Q

Quotient Identities

tanx

A

sinx/cosx

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8
Q

Quotient Identities

cotx

A

cosx/sinx

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9
Q

Pythagorean Identities

sin^2x+cos^2x

A

1

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10
Q

Pythagorean Identities

tan^2x+1

A

sec^2x

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11
Q

Pythagorean Identities

1+cot^2x

A

csc^2x

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12
Q

Even odd formulas

cos or sec (-0)

A

cos or sec (0)

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13
Q

Even odd formulas

sin or tan or csc or cot(-0)

A

-sin or -tan or -csc or -cot(0)

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14
Q

Double Angle Formulas

sin(2x)

A

2sinxcosx

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15
Q

Double Angle Formulas

cos(2x)

A

cos^2x-sin^2x
1-2sin^2x
2cos^2x-1

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16
Q

Double Angle Formulas

tan(2x)

A

2tanx/1-tan^2x

17
Q

Power Reducing Formulas

Sin^2x

A

1/2[1-cos2x]

18
Q

Power Reducing Formulas

Cos^2x

A

1/2[1+cos2x]