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OpenStudy (anonymous):
Use the definitions of the trigonometric ratios for a right triangle to derive a cofunction identity for tan(90° - A). Show your steps.
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OpenStudy (anonymous):
\[Tan(90° - A) = \frac{ Sin(90°-A) }{ Cos(90°-A) }=\frac{ Cos(A) }{ Sin(A) } = Cot(A)\]
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