Trig Identities
Identities involving trig
functions are listed below.
Odd/Even Identities
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sin (–x) = –sin x
cos (–x) = cos x
tan (–x) = –tan x
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csc (–x) = –csc x
sec (–x) = sec x
cot (–x) = –cot x
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Periodicity Identities, radians
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Periodicity Identities, degrees |
sin (x + 2π) = sin x
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csc (x + 2π) = csc x
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sin (x + 360°) = sin x
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csc (x + 360°) = csc x
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cos (x + 2π) = cos x
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sec (x + 2π) = sec x
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cos (x + 360°) = cos x
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sec (x + 360°) = sec x
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tan (x + π) = tan x
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cot (x + π) = cot x
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tan (x + 180°) = tan x
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cot (x + 180°) = cot x
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See also
Sine, cosine, tangent, cosecant, secant, cotangent
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