Equivalent Trigonometric Representations
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9 Terms
1
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Sum and Difference Identity (sin)
sin(a±B) = sin(a)cos(B)±cos(a)sin(B)
2
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Sum and Difference Identity (cos)
cos(a±B) = cos(a)sin(a)-/+sin(B)cos(B)
3
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Double Angle Identity, sin(2θ)
2sinθcosθ
4
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Double Angle Identity, cos(2θ)
1 - 2sin²θ
5
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Pythagorean Identity
cos²θ + sin²θ = 1
6
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cos²θ =
1 - sin²θ
7
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sin²θ =
1 - cos²θ
8
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sec²θ =
1 + tan²θ
9
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csc²θ =
1 + cot²θ