Question

use the graph of y=sec x to estimate the value of sec 165 degrees. round to nearest tenth

-1
-1.9
0.1
1

Answer 1

why don't you cheat and use a calculator to find \(\sec(135)\) and round to the nearest tenth?

Answer 2

oops i meant
\[\sec(165)\]

Answer 3

cause i still want to learn how to read the graph

Answer 4

http://www.wolframalpha.com/input/?i=sec%28165%29

Answer 5

oh ok that's reasonable

Answer 6

go over until you see \(165\) on the \(x\) axis

Answer 7

but im assuming the answer is -1.0

Answer 8

okay

Answer 9

you have to note that one block on the \(x\) axis corresponds to 30 degrees
you can tell by where they put the 90

Answer 10

ok thanks so much

Answer 11

so \(165\) is half way between \(150\) and \(180\)
then see that the \(y\) value of the curve there is about \(-1\)
you have to also look at the scale on the \(y\) axis

Answer 12

yw