1.

sec h^(-1)(cos theta) =

Answer»

`log|tan((pi)/(6) + (THETA)/(2))|`
`log|tan((pi)/(3) + (theta)/(2))|`
`log|tan((pi)/(4) + (theta)/(2))|`
`log|tan((pi)/(4) - (theta)/(2))|`

ANSWER :C


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