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ZeroAT
 4 years ago
Please tell me how to do this problem
Evaluate : sin(1/4 pie)
A) 1
B) 0
C) sqrt 2 /2
D None of these
ZeroAT
 4 years ago
Please tell me how to do this problem Evaluate : sin(1/4 pie) A) 1 B) 0 C) sqrt 2 /2 D None of these

This Question is Closed

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.2look at the unit circle on the last page of this cheat sheet.

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.2you will see that at \[\frac{\pi}{4}\] both the first and second coordinate on the unit circle is \[\frac{\sqrt{2}}{2}\] so both sine and cosine are the same there

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.2you can also do it directly using a triangle but this one comes up so often it is best to memorize it

ZeroAT
 4 years ago
Best ResponseYou've already chosen the best response.0ok then how would i do a problem like tan( 337 pie /4 )

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.2oh lord. first of all you best find a point between 0 and 2 pi that is coterminal with \[\frac{337\pi}{4}\]

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.2myininaya will who you how, because last time i did this i got in a huge discussion mmmm pie

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.2ok fine. lets to it the easy (for me) way \[\frac{337}{4}=84\tfrac{1}{4}\] and since 2 divides 84 evenly this angle is co terminal with \[\frac{\pi}{4}\]

myininaya
 4 years ago
Best ResponseYou've already chosen the best response.0what value does pie hold?

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.2\[\sin(\frac{\pi}{4})=\frac{\sqrt{2}}{2}, \cos(\frac{\pi}{4})=\frac{\sqrt{2}}{2}\] and since tangent is the ratio of sine over cosine you get 1

ZeroAT
 4 years ago
Best ResponseYou've already chosen the best response.0so the final answer is 1?

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.2and if you doubt me, here is proof http://www.wolframalpha.com/input/?i=tan%28337+pi%2F4%29

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.2\[\color{blue}{\text{sk}}\color{red}{\pi}\color{blue}{\text{y}}\]

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.2that, my myininaya, was for you

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.2c'mon. what did i write?

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.2what do you see there?

myininaya
 4 years ago
Best ResponseYou've already chosen the best response.0lol this pie concerns me

satellite73
 4 years ago
Best ResponseYou've already chosen the best response.2i made a joke. visual pun. ok not that clever but still...
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