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I want to calculate the average of a set of angles, which represents source bearing (0 to 360 deg) - (similar to wind-direction)
I know it has been discussed before (several times). The accepted answer was Compute unit vectors from the angles and take...
Started by Lior Kogan on
, 12 posts
by 12 people.
Answer Snippets (Read the full thread at stackoverflow):
Equivalent, but more robust algorithm (and simpler):
divide angles into 2 groups, [0-180) and [180-360 the angles into 2 groups: [0-180) and [180-360) for angle in newAngles: if angle < 180 any real consensus....
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On Wed, 4 Mar 2009 04:41:01 +0000 (UTC), "Ben " <benlawr2000@yahoo.com
Hi,
I am new to MATLAB. Can anyone give me hints on how to solve 2 nonlinear equations. The angles are unknown. Basically, i have this equation:
r2*cos(theta_2) - r1*cos(theta...
Started by Ben on
, 4 posts
by 2 people.
Answer Snippets (Read the full thread at omgili):
When I tried solving the four equations:
x4-x3 = p of your 1st equation....
X3+q*y3 = (r4^2-r3^2-p^2-q^2)/2
Solving for, say, y3 in terms of x3 in this and substituting the range from -pi to +pi or from 0 to 2*pi.
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How do you use the sine rule to find TWO unknown angles or sides? The Question is as follows;
x/sin(30) = 4-x/sin(45)
Prove that x = 4(root 2 -1)
Please help ASAP!!
Started by Rois C on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at yahoo):
) =(4-x)/(1/root2)
giving 2x=root2(4-x) and solving gives x=4root2/(2+root2)
which you rationalizesin30 = 1/2 and sin45 = 1/√2
I am assuming you mean x/sin30 = (4 - x)/sin45
=> 2x = (4 - x)√2
=> 2x + x√2 = 4√....
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I have learned a lot of formulas for converting trigonometric values, but when I looked up sin(pi/10) I got the exact answer (1/4)(√5 +1). I tried to arive at this using formulas, but I couldn't. How is this found? What other angles can be found exactly...
Started by AlephOmega on
, 9 posts
by 4 people.
Answer Snippets (Read the full thread at physicsforums):
For small angles sinx is very formulas (sin(a)^2 = (1-cos 2a)/2 )
Half and double angle formulas (derived from the above two formulas)
Sum to product formulas....
Not sure where or how you got the exact answer, but it is not right .
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So, I got this idea. I wanted to see if it is possible, without using an iterative solution, to determine the angle and bearing required to launch a projectile with a known gravitational acceleration and velocity and hit a target with a known acceleration...
Started by elseagoat on
, 5 posts
by 2 people.
Answer Snippets (Read the full thread at mymathforum):
During my simplification of this problem from 3 dimensions to 2 dimensions, I have actually failed....
In this axis, thus the value for acceleration is 0, and thus the (1/2)*a*(t^2) term gets dropped this, I am realizing a horrible mistake.
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On Thu, 7 May 2009 11:47:01 +0000 (UTC), "Andrew Mackenzie" <#macac#001#@students.unisa.edu.au
I am trying to find the value of t, when phi = 60? or pi/3 radians.
syms t
x = 8 + 2 * cos(pi*t);
alpha = atan(8/x);
beta = acos(sqrt(x^2 + 64) / 40)...
Started by Andrew Mackenzie on
, 7 posts
by 4 people.
Answer Snippets (Read the full thread at omgili):
In mathematical, not programatical ....
Typed exactly
there, in case), and I do not get what you got
EDU
phi =
pi - atan(8/(2*cos(pi*t) + 8)) - acos(1/20*(1/4*(2*cos(pi*t) + 8)^2 +
16)^(1/2))
EDU
EDU
ans =
1.0000 - 1.1377i.
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On Wed, 24 Jun 2009 02:03:21 -0700 (PDT), Archimedes Plutonium <plutonium.archimedes@gmail.com
Alright, here is another part of Calculus that the limit is unable
to perform, but where the AP-Reals is at home and comfortable
in solving.
On page ...
Started by Archimedes Plutonium on
, 13 posts
by 4 people.
Answer Snippets (Read the full thread at omgili):
So, (1) you have no logical head to even think with (2) you need to
learn if the function 1/x^2 of Strang's page 86 can be rigged
to have
a break of 10^(-)500 as x approaches 0 a
Parallel
Postulate for you would....
To consider your
questions.
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On Wed, 24 Jun 2009 11:33:21 -0500, "Mackly" <invalid@invalid.com
"Archimedes Plutonium" <plutonium.archimedes@gmail.comnews:9ce460f2-007a-43c3-bcb9-b1128d74211a@z34g2000vbl.googlegroups.com...
<snip crap
WRONG. What is the value of the...
Started by Mackly on
, 12 posts
by 4 people.
Answer Snippets (Read the full thread at omgili):
Now I wonder if the function 1/x^2 of Strang's page 86 can be rigged
to have
a break of 10^(-)500 then you cannot have a
Parallel....
So, (1) you have no logical head to even think with (2) you.
And then expect me to consider your
questions.
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Finding the angle between two vectors is not hard using the cosine rule. However, because I am programming for a platform with very limited resources, I would like to avoid calculations such as sqrt and arccos. Even simple divide's should be limited as...
Started by Jeroen on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
Where length of V1 L1 = sqrt(x1^2 + y1^2), and length of V2 L2 = sqrt(x2^2 + y2^2*y2)));
Have you tried a CORDIC algorithm? It's a general framework for solving polar ↔ rectangular problems with only add/subtract/....
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I have a vector consisting of a point, speed and direction. We will call this vector R. And another vector that only consists of a point and a speed. No direction. We will call this one T. Now, what I am trying to do is to find the shortest intersection...
Started by Jacks_Depression on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
Some equation solving you end up with
(4)
I) a = sum(p-q)/(s 2 -sum(d 2 ))
II) b = 2*sum(d*(p-q))/(s 2 the direction vector e , write it like this
(2) e = (p-q)/t + d
Now you don't need the time t point directly....
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