Cosinus kąta ostrego α jest równy 12/13. Wtedy

$\displaystyle \sin\alpha= \frac{12}{13}$\displaystyle \sin\alpha= \frac{12}{13}

$\displaystyle \sin\alpha= \frac{1}{13}$\displaystyle \sin\alpha= \frac{1}{13}

$\displaystyle \sin\alpha= \frac{5}{13}$\displaystyle \sin\alpha= \frac{5}{13}

$\displaystyle \sin\alpha= \frac{25}{169}$\displaystyle \sin\alpha= \frac{25}{169}