Question

Solve: `2cos (x/3) = 2` ?

Answer 1

Deleted

Explanation:

Answer 2

`x = 6npi : n in ZZ`

Explanation:

`2cos (x/3) = 2`

`cos (x/3) = 1`

`x/3 = arccos 1`

`x/3 = 2npi : n in ZZ`

`x = 6npi : n in ZZ`