Question

solving equation arccos (2x^2-1) =2arccos (1/2)

Answer 1

On the right...arccos(1?2)=pi/3. Do you agree?

Answer 2

So now we have:
arccos(2x^2-1)=2pi/3

Answer 3

And not take cosine of both sides.

Answer 4

2x^2-1=-1/2
Solve that equation

Answer 5

And not take cosine of both sides. now....instead of not

Answer 6

ok thanks
Can I solve it in another way?

Answer 7

Maybe but I do not know another method. Perhaps you could show me.

Answer 8

I can not, I'm just wondering