Kąt α jest ostry oraz cosα= 5/13.Tangens kąta α jest równy

$\displaystyle \frac{5}{12}$\displaystyle \frac{5}{12}

$\displaystyle \frac{12}{13}$\displaystyle \frac{12}{13}

$\displaystyle \frac{13}{12}$\displaystyle \frac{13}{12}

$\displaystyle \frac{12}{5}$\displaystyle \frac{12}{5}