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Find the exact value of each trigonometric function using the unit circle ​

Find the exact value of each trigonometric function using the unit circle ​-example-1
User Corstian Boerman
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1 Answer

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19 votes

Answer:

Explanation:

use the co-terminal idea Scarlett, 990° = 270 °. You can see this just by looking at the picture.

Tan(270 ) = sin(270) / cos(270) = -sin(90) / cos(90) so now we know that Tan(270) is one of the non-existant angles b/c cos(90) = 0 and that would mean that we have some number over 0... and then the universe blows up.. like my calc II professor liked to say :| I think he was being a bit dramatic. :P anyway, you want answers not long boring stories.. :D so Tan(270) DNE ( does not exist )

If we were to look at a graph of Tan , we'd see that at 270° or 3
image/2 , Tan runs off to infinity. So there isn't a number to represent it. :/ I'm attaching a picture of the graph

notice in the graph, that when tan gets to 3/2, it's running off to infinity ??

Find the exact value of each trigonometric function using the unit circle ​-example-1
User Colithium
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3.6k points