Question

$sqrt{tga}+ sqrt{tga}$ если tga+ctga=a (a>0)

Answer 1

$sqrt{tga}+sqrt{ctga}=?\ tga+ctga=a\ (sqrt{tga}+sqrt{ctga})^2=tga+ctga+2sqrt{tga*ctga}=a+2\ sqrt{tga}+sqrt{ctga}=sqrt{a+2}$