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#