Asked by Anonymous
I'm confused with this concept:
Okay, so I have this problem:
cos2x( 2 cos+1)= 0
I understand I have to work the problems separately and I get cos x= 2 and cos x= 1/2
Now, what I don't understand is how this connects to pi, radians or the unit circle. If someone could explain or point me to a place with a thorough explanation, please tell me. B/c trust me, I've looked EVERYWHERE and my book/teacher doesn't really explain the theory very well.
Okay, so I have this problem:
cos2x( 2 cos+1)= 0
I understand I have to work the problems separately and I get cos x= 2 and cos x= 1/2
Now, what I don't understand is how this connects to pi, radians or the unit circle. If someone could explain or point me to a place with a thorough explanation, please tell me. B/c trust me, I've looked EVERYWHERE and my book/teacher doesn't really explain the theory very well.
Answers
Answered by
Damon
I get cos x= 2 ?????
I do not
I get
cos 2 x = 0
that means that 2x = pi/2 or 90 degrees or 2x = 3 pi/2 or 270 degrees
or x = pi/4 or 3pi/4
then
cos x = -1/2
well cos of 60 degrees or pi/3 is 1/2
so cos (180-60) = -1/2 so x =2pi/3
or 180+60 which is 5pi/3
I do not
I get
cos 2 x = 0
that means that 2x = pi/2 or 90 degrees or 2x = 3 pi/2 or 270 degrees
or x = pi/4 or 3pi/4
then
cos x = -1/2
well cos of 60 degrees or pi/3 is 1/2
so cos (180-60) = -1/2 so x =2pi/3
or 180+60 which is 5pi/3
Answered by
Anonymous
sry it's cos^2x
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.