Question

Find the value of the sec 19 degrees using you calculator. (This might be a really simple question but I just don't know how to plug it into my calculator)
Answers: 0.946, 1.011, 0.989, 1.058

Answer 1

If you're using a graphing calculator, make sure you're in DEG mode (not RAD). There probably is no button for the secant function, but remember that secant is defined as the reciprocal of cosine:

$\sec19^\circ=\dfrac1{\cos19^\circ}$

So on your calculator, you'd type

1/cos(19)

and you should get about 1.0576.