Angles Definition and 892 Threads

This is more of a concept problem that I'm trying to grasp. Verbatim from the book: "A box is moving with a horizontal velocity, v, relative to an inertial frame of reference so that a medallion of mass, m, inside of the box hangs from the roof of the box with an angle, theta, relative to...

:confused: I'm stumped on my hw...can anyone help? The question is long, but as follows: a merry-go-round has circular platform that is 1m from the central axis at its inner edge and is 5m from the central axis at its outer edge. The ride takes 10s for 1 rotation. A passenger holds...

I'm having trouble with this question because of the angles. Could someone point me in the right direction. Two forces F1 and F2 act on a body of mass 28kg. F1 has a magnitude of 8N and is directed due east. The second force F2 has a magnitude of 10N and acts in a direction 50 degrees west...

Using the formula relating the tangent of angle p enclosed between two given straight line L1 and L2 and respective slope m1 and m2,Find the measure in degrees of angles A and C of the triangle with vertices A(-3,4),B(5,6) and C(2,1) My work is Tan A = Ma = yb-ya/xb-xa=6-4/5+3=2/8=1/4...

Hi! I'm examining the equality between line slopes and angles. I've, using trig, conclude that this equation holds: sin(v) = \frac{m}{ \sqrt{1+m^2}} Anyone knowing a simpler equation is very welcome to post.

Explain me why the sum of the interior angles of a triangle is not equal to 180 degrees on a spherical surface?

hi, i need help on a question its like... there is a operator supported a plank horizontally by its two ends, but when loaded bricks on its centre and found that the weight of 166kg of bricks was just enough to break the plank. But an identical plank is now being used as a ramp to load a full...

Im stuck on a 3d vector problem. I know Fx and Fz and angle Beta. I've looked at all the equations in the book (both my statics and physics book) and just cannot seem to put the given data together in a manner to give me another value. If I can just get either Fy or one of the other angles, I...

THis is a rather simple question and please feel free to delete it after it has been answered. I know that in a circle, Angles Subtended by the same Segment are equal. Question: Are angles subtended by equal, yet different (different positions on the circle), euqal? Thanks

I do not quite get what principle angle angles are. Are they the smallest positive coterminal angle of an angle? Would the principle angles of: 1000 degrees be 280 degrees -500 degrees be 220 degrees ? Am I on the right track?

I know how to do critical angle problems, using snell's law, but i was given a circle and I'm not sure how i should go about finding the incident angle.. If someone could help me out with that it would be awesome! THX Nicole

I'm trying to review spherical trinometry on my own and I'm stuck where it says the supplement of the solved dihedral angle can be implemented. I'm using "PLANE AND SPHERICAL TRIGONOMETRY" by Paul Rider. Can anyone explain the concept behind that statement, because the examples that I have are...

There's a square detector of area A. When a point source is placed at the center of this detector, half of the emitted particles are detected. What fraction of the particles are detected when the point source is placed a distance x away? I figured that at x=0, 50% of the particles are...

hi, I'm having trouble with another question: 2. A block of weight W is attached to the ceiling by a cord which makes an angle θ = 30° to the vertical, and to the wall by a horizontal cord. If the tension in the cord attached to the ceiling is 20 N, the tension in the horizontal cord will...

I had made an error on my previous post so i will take it back to the beginning. I can't get this one for some reason. First look at the diagram: http://bosco.iwarp.com/diagram.jpg OK here's the problem: Two identical balls (mass m) undergo a collision. Initially one ball is...

I posted this in the chemistry section, but I was recommended up here. We have a molecule with three unbonded electon pairs, so they will repel each other as much as possible. That's easy, it's 360º/3 = 120º However, when we have four unbonded electron pairs the angle is 109.5º How? I...

Howdy, I'm trying to calculate the angles between the repulsion of electrons. Well, it looks like a vector problem. Basically, can I just think of 360º between each of the individual the XY, XZ, and YZ planes. If I set everything up with generic variables to everything, will they drop out at...

Is it possible to determine the smallest angle that can be resolved with a telescope if the only information you're given is the telescope's aperture? If anyone can help me out I'd appreciate it.

Does anyone know a site that shows how to draw angles using only a ruler and a compass? 60 degree, 35 degree, 45 degree angels ect. Any explanation on how to do this would be great. I have to show curves to signify that I used the compass and I believe the method involves a point of...

Why are electric field lines always crossing equipotential lines at right angles? Can somebody please explain this to me? Thanks :smile:

Can anyone help me in understanding solid angles and how to work them out in the context of Gauss' Law and Amperes Law calculations

Hi Arcsin width/length of a water droplet on any surface will give you the angle between the droplet trajectory before falling (assume straight line rather than parabola) and the surface upon which it fell. As this angle approaches 90degrees (water drop falling vertically on a horizontal...

Two forces-- 50N and 60N are applied to the same point on a cart. Determine the resultant force on that cart when the angle bewteen the two forces is: a) 60 degrees Ok, I'm getting weird answers. I draw a diagram of that. Then I use cosine law and plug everything in and I end up getting 56N...

I know the formula for friction coefficients is force over weight, but i don't understand what to do when angles are involved. Please help me by showing me where to put the angle measurements in this problem. A 1000-N crate is being pushed across a level floor at a constant speed by a force...

How can I prove that cos(45 - v) = sin (v + 45) for all angles v? :rolleyes:

When i have tan2x = 1 i get two angles: 22,5 and 205,5. But I also get 112,5 and 292,5 why? Why don`t I get just two? :rolleyes:

to solve a quadrilateral when you know all four angles and one side? I can't seem to find any way to solve the other 3 sides in this one question I am working on. thanks :biggrin:

I'm very new to this. I know that to find the angle between two vectors we use the dot product, but what about finding the angle between a vector and each of it's axes? for example: A = 3i+2j+k, How can I employ the dot product when there is no other vector? Thanks and keep posting! Amil

terminating angles?? If sin(x) = cos(x), in which quadrants can angle x terminate? I have no clue what this question is asking. also... If {x+sin(x)}/cos(x) then f(pi) = ? {pi+sin(pi)}/cos(pi)= pi+0/-1 = -pi is that correct?

my question is, how do you "Find one positive angle and one negative angle that are coterminal with each angle." : For example: \frac{5\pi}{12} And also, I had a question on this as well: Find the reference angle for each angle with the given measure. \frac{12\pi}{5} i noe...

Here is the question: Violet light has a frequency of 7.5 * 10^14 hz and travels from air to glass at an angle of 30 degrees. The index of refraction for violet light is 1.54. A) Find the angle of refraction B) Find the wavelength in air C) Find the wavelength in glass D) What is the...

I want to do some math for 4-link suspension, and I soon realized I don't know crap. Say I take measurements of the lengths of the four connecting rods and one angle measurement. How do I find the values of the other three angles?

A slender rod of length l and mass m rotates with constant angular verlocity omega about an axis which is at an angle alpha to the rod and pases through its centre. Obtain an expression for the torque acting on the rod and get eth equation of motion of the rod once it is released from its...

Two identical uniform beams, each having a mass of 4 kg, are symmetrically set up against each other on a floor with which they have a coefficient of static friction µ = 0.609 . a) What is the minimum angle the beams can make with the floor without falling? b) For the angle calculated in...

The rear-view mirror of a car is so placed that its upper and lower edges are horizontal and its cener is at the same level as the center of the rear window. The driver's eye is also at this level, and the line of sight from his eye on the center of the mirror makes an angle of 30 degrees with...

HELP please: vector angles and velocity Alright i don't nessesarily need an answer for this but maybe just a way to set it up. The problem is worded weird and no one can figure it out. A passenger walks from one side of the ferry to the other side as it approaches a dock. If the...

I understand that Sin is Opposite over the Hypotenuse, Cosine is Adjacent over Hypotenue, and Tangent is Opposite over the Adjacent. But I don't know how to use it. Sin has its own equation, as does Tangent...I am just confused. What do I do to find a specific angle? What about a certain side...

Why does a circles angles equal up to 2pi? Wouldn't it be 1pi? Please help. My geometry teacher (last year - and now he's gone) drew a circle for me and defined all the points in terms of pi (is there an ASCII character for pi, by-the-way, on the keyboard?). Where the 90 degree point would be...

Let ABC be a triangle and P a point inside it... Prove that at least one of the angles PAB, PBC or PCA measures less or equal to 30 degrees...

What is the largest possible number of acute angles that a 2001-gon (shape with 2001 sides) can have if no two sides cross each other [?]

ok so this was in my end of unit test today and i have been stressing as to what i should have done, so as it's not really homework you could always just tell me the answer pretty basic stuff, a ray of light is incident from a substance upon the surface of another substance with n=1. i...

An enemy ship is on the western side of a mountain island. The enemy ship can maneuver to within 2500 m of the 1800-m-high mountain peak and can shoot projectiles with an initial speed of 250m/s. If the eastern shoreline is horizontally 300m from the peak, what are the distances from the...