Question

Помогите решить!
$10 sqrt{11} tg(arccos frac{5}{6} )$

Answer 1

tg(arccosx)=$sqrt{1- x^{2} }$/x
10√11tg(arccos5/6)=10√11*$sqrt{1- (5/6)^{2} }$:5/6=
10√11*$sqrt{1- 25/36 }$*6/5=10√11*√11/6*6/5=10*11/5=22