Question

синус=1:4. Найти: косинус, тангенс.

Answer 1

$cosalpha=pmsqrt{1-left(frac{1}{4}right)^2}=pmsqrt{frac{15}{16}}=pmfrac{sqrt{15}}{4}$

 

$tanalpha=frac{sinalpha}{cosalpha}=mpfrac{1}{sqrt{15}}$