1.

Solve `cos theta=1//3`.

Answer» Correct Answer - `theta=2npi pm cos^(-1) 1/3, n in Z`
`cos theta=1//3` or `cos theta=cos^(-1) (cos 1//3)`
`rArr theta=2n pi pm "cos"^(-1) 1/3, n in Z`


Discussion

No Comment Found