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:
So on your calculator, you'd type
1/cos(19)
and you should get about 1.0576.
Answer:
a 12= − 3 n 2 − n
Step-by-step explanation:
hmmmmmm look on Firefox
Answer: 123