How do you find the value of $sec (-450)$ ?

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Answer 1 · 2015-10-27T04:26:45

Find sec (-450)

Ans: undefined

$sec (-450) = 1/(cos -450)$ . Find cos (-450).
cos (-450) = cos (-90 - 360) = cos (-90) = cos 90 = 0
Therefor, $sec (-450) = 1/cos 90 =$ undefined

How do you find the value of sec (-450)sec (-450)?