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

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

anonymous · Answer

attachment

anonymous · Answer

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

anonymous · Answer

oops i meant 
$$\sec(165)$$

anonymous · Answer

cause i still want to learn how to read the graph

anonymous · Answer

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

anonymous · Answer

oh ok that's reasonable

anonymous · Answer

go over until you see $165$ on the $x$ axis

anonymous · Answer

but im assuming the answer is -1.0

anonymous · Answer

okay

anonymous · Answer

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

anonymous · Answer

ok thanks so much

anonymous · Answer

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

anonymous · Answer

yw