Question

упростить
1+tg^2(П/4-x/2)

Answer 1

$Tozdestvo:; ; 1+tg^2 alpha =frac{1}{cos^2 alpha }\\\1+tg^2(frac{pi}{4}-frac{x}{2})=frac{1}{cos^2(frac{pi}{4}-frac{x}{2})}$