Trigonometric Identities

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8 Terms

1
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Reciprocal Identity #1

sin x = 1/csc x

2
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Reciprocal Identity #2

cos x =\frac{1}{\sec x}

3
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Reciprocal Identity #3

tan x = 1/cot x

4
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Quotient Identity #1

tan x = sin x/ cos x

5
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Quotient Identity #2

cot x = cos x/sin x

6
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Pythagorean Identity #1

sin²x + cos²x = 1

7
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Pythagorean Identity #2

tan² + 1 = sec²x

8
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Pythagorean Identity #3

cot²x + 1 = csc²x