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Question
Find the values of the following trigonometric ratio.
sec 390°
Sum
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Solution
sec 390° = sec(360° + 30°)
= sec 30°
`= 1/(cos 30^circ)`
`= 1/((sqrt3/2))`
`= 2/sqrt3`
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Chapter 4: Trigonometry - Exercise 4.1 [Page 81]
