How do you use a calculator to evaluate $sec2.8$ ?

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Answer 1 · 2016-12-26T19:15:17

$sec 2.8=1.00119529$

$sectheta = 1/costheta$

$sec2.8 =1/cos2.8=1.00119529$

scientific calculator hp 9s:-

press 1

press $-:$

press cos 2.8

press enter

or:-

press 2.8

press cos

press 2ndF

press $x^2$

How do you use a calculator to evaluate sec2.8sec2.8?