Find the principal and general solution of `sec x = 2`.

Answer

Particular solution: `x=pi/3`

General solution: `x=2n pi pm pi/3, n in mathbbZ`

Explanation

`secx=2`

`implies secx=sec\ pi/3`

`implies x=pi/3`


Thus, the particular solution is `x=pi/3`.


`secx=2`

`cosx=1/2`

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