How do you verify $tan y cot y = 1$ $tan y cot y = 1$ ?

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How do you verify $tan y cot y = 1$ $tan y cot y = 1$ ?

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Answer 1 · 2018-06-18T05:23:45

$tan y = \frac{sin y}{cos y}$ $tan y=sin y /cos y$
$cot y = \frac{cos y}{sin y} = \frac{1}{tan y}$ $cot y=cos y /sin y=1/tan y$
$d o m (cot (y)) = {y ∣ y \neq \frac{2 n + 1}{2} π$ $dom(cot(y))={y|y!=(2n+1)/2 pi$ (n=integer number) $}$ $}$
$d o m (cot (y)) = {y ∣ y \neq n π$ $dom(cot(y))={y|y!=n pi$ (n=integer number) $}$ $}$
$y \neq \frac{n}{2} π$ $y!=n/2 pi$ (n=integer number)
$tan y \cdot cot y = 1$ $tan y * cot y = 1$

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How do you verify $tan y cot y = 1$ $tan y cot y = 1$ ?

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How do you verify $tan y cot y = 1$ $tan y cot y = 1$ ?