Question

Решить уравнение: tg(6arccos4x)=0

Answer 1

$tg(6arccos4x)=0 \\ 6arccos4x= \pi n \\ arccos4x= \frac{ \pi n }{6} \\ cos(arccos4x)=cos\frac{ \pi n }{6} \\ 4x=cos\frac{ \pi n }{6} \\ x= \frac{1}{4} cos\frac{ \pi n }{6}$
n,∈Z

Answer 2

Tg(6arccos4x)=0
6arccos4x=π
arccos4x=π/6
4x=cosπ/6
4x=√3/2
x=√3/8