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Fin the value of Theta if sec theta=3

I inverted the value of sec theta to get cos theta=1/3 I then said Theta=cos-1 (1/3)

Is thus correct? What is the answer rounded to the tenths place?

1 answer

so what did your calculator say?

remember the angle could have been in quadrant IV also.
so 360-(whatever your calculator said)°

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