Find the value of 3sec2.4. (Round to the nearest tenth.)

Answer 1

again?
3 sec 2.4 = 3/cos 2.4

your calculator can surely do that.
Or google
or wolframalpha.com

Answer 2

And I had already done this for you here

http://www.jiskha.com/display.cgi?id=1385827548

This is the third time you have posted this question.
Always check your previous post before re-posting