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The value of sec`690^(@)` is :

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The value of sec`690^(@)` is :
A. `(sqrt(3))/(2)`
B. `-(sqrt(3))/(2)`
C. `(2)/(sqrt(3))`
D. `-(2)/(sqrt(3))`
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1 Answer

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Correct Answer - C
The value ……….
`sec690^(@)= sec(720^(@)-30^(@))= sec(-30^(@))=sec30^(@) = (2)/(sqrt(3))`
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