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tan(90 – x) | tan(90 – A) | tan(90 – theta) | Identity for tan(90 – x) | value of tan(90 – A)

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tan(90 + x) | tan(90 + A) | tan(90 + theta) | Identity for tan(90 + x) | value of tan(90 + A)

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How and why T Rstios, Tan(90-A) Tan(90+A) Tan180-A tan 180+A tan 270-A tan 270+A tan 360-A cot 270-A