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/sci/ - Science & Math

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3920048

Anonymous Tue Oct 18 11:32:57 2011 No.3920048 [Reply] [Original]

how do I calculate angle "a"

>>	Anonymous Tue Oct 18 11:35:57 2011 No.3920058 OP here it has to be the tangent but how do I calculate it?

>>	Anonymous Tue Oct 18 11:35:57 2011 No.3920057 File: 8 KB, 460x351, 1318951938885.png [View same] [iqdb] [saucenao] [google]

>>	Anonymous Tue Oct 18 11:37:57 2011 No.3920066 File: 41 KB, 449x319, 6-5.jpg [View same] [iqdb] [saucenao] [google] >>3920057 Nothing gets me off like maths.

>>	Anonymous Tue Oct 18 11:43:57 2011 No.3920088 >>3920066 >grade school geometry >math

>>	Anonymous Tue Oct 18 11:43:57 2011 No.3920090 arcsin(R/r)

>>	Anonymous Tue Oct 18 11:53:57 2011 No.3920119 >>3920088 yes, euclidean geometry is math, just like huckleberry finn is literature

>>	Anonymous Tue Oct 18 11:54:40 2011 No.3920121 >>3920088 >mfw when I'm a Physics grad student and I can't solve Euclidean geometry problems

>>	Anonymous Tue Oct 18 11:55:57 2011 No.3920126 >>3920119 Huckleberry Finn is literature. A fine example of social satire.

>>	Anonymous Tue Oct 18 11:57:57 2011 No.3920135 isn't angle a = the angle r makes with the red line?

>>	Anonymous Tue Oct 18 11:59:57 2011 No.3920143 >>3920135 no a = arcsin(R/r)

>>	Anonymous Tue Oct 18 12:00:57 2011 No.3920149 If you extend the radius, you'll see that a + theta makes a right angle.

>>	Anonymous Tue Oct 18 12:01:57 2011 No.3920152 pi/4 - arccos(R/r)

>>	Anonymous Tue Oct 18 12:03:57 2011 No.3920156 >>3920152 which equals arcsin(R/r)

>>	Anonymous Tue Oct 18 12:04:57 2011 No.3920159 >>3920156 wrong

>>	Anonymous Tue Oct 18 12:04:57 2011 No.3920161 >>3920159 oh god, a retard

>>	Anonymous Tue Oct 18 12:08:57 2011 No.3920168 >>3920159 you are right, pi/2 - arccos(R/r) = arcsin(R/r) both these are correct pi/4 - arccos(R/r) is nonsense

>>	Anonymous Tue Oct 18 12:08:57 2011 No.3920170 >>3920161 You're correct and wrong. It's pi/2 - arccos(R/r) = arcsin(R/r)

>>	Anonymous Tue Oct 18 12:08:57 2011 No.3920171 >>3920152 do you mean pi/2?

>>	Anonymous Tue Oct 18 12:09:57 2011 No.3920176 >>3920171 Yep, fucking taufags. I need sleep

>>	Anonymous Tue Oct 18 12:10:57 2011 No.3920180 It looks like the tangent line is parallel to <span class="math">\vec{r}[/spoiler], so it should just be <span class="math">180°-r_{\phi}[/spoiler].

>>	Anonymous Tue Oct 18 12:11:57 2011 No.3920184 >>3920180 >it looks like facepalm r is an arbitrary radius

>>	Anonymous Tue Oct 18 12:11:57 2011 No.3920185 heres what id do find the first derivative of the function of the circle sub in (x=l, y=sqrt(l^2 + r^2)) get slope solve using trig but then again i suck cocks

>>	Anonymous Tue Oct 18 12:22:57 2011 No.3920213 >>3920184 Why is it notated like a vector then? If it were just to show the length of the arbitrary radius, then, well, see pic.

>>	Anonymous Tue Oct 18 12:22:57 2011 No.3920216 File: 14 KB, 642x243, totallynottrollin.jpg [View same] [iqdb] [saucenao] [google] >>3920213 forgot pic

>>	Anonymous Tue Oct 18 12:27:57 2011 No.3920228 >>3920216 >aspies gonna asp we have AIs that would have recognized that r is the radius, and you cant? do you have to go through a catalog of all the different chairs every time a new chair is made in order to know if something is a chair or a table?

>>	Anonymous Tue Oct 18 12:32:17 2011 No.3920248 >>3920228 We have AIs that can read the filename and you can't?

>>	Anonymous Tue Oct 18 12:49:57 2011 No.3920255 >>3920228 >retards gonna tard We have AIs that can read the filename and you can't? facepalm