Trig Identites Flashcards

1
Q

sin²(x)

A

1 - cos²(x) or (1 - cos(2x))/2

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2
Q

cos²(x)

A

1 - sin²(x) or (1 + cos(2x))/2

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3
Q

sin²(x) + cos²(x)

A

1

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4
Q

sec²(x)

A

1 + tan²(x)

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5
Q

csc²(x)

A

1 + cot²(x)

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6
Q

tan²(x)

A

sec²(x) - 1

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7
Q

cot²(x)

A

csc²(x) - 1

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8
Q

sin(2θ)

A

2sin(θ)cos(θ)

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