What the hell is trigonometry and what does this mean?
929528
A ray is a line segment emanating out from a point.  When you rotate the ray around the point, you "sweep through" an angle.  Encarta is just rigorously defining an angle.
324968
its just triangle mathe. remember soh -cah -toa... sine =opposite side/hypotenuse,  cosine=adjacent side/hypotenuse, tangent= opposite side/adjacent side....cosecant(hypotenuse/opposite side) is the opposite of sine, secant(hypotenuse/adjacent side) is the opposite of cosine and cotangent(adjacent side/opposite side) is the opposite of tangent
610758
sin(2x) = 2sinxcosx is a trigonometric identity called the double angle identity. It was derived from another identity:\n\n   sin(x + y) = sinxcosy + cosxsiny\n \nhere x and y are two different angles but what if x = y\nreplace y with x to make all the equations in terms of x, thus the equation becomes:\n\n   sin(x + x) = sinxcosx + cosxsinx\n   \nnote that sinxcosx is also equal to cosxsinx, so simplifying the equation it becomes:\n\n  sin(2x) = 2sinxcosx or sin(2x) = 2cosxsinx
290580
It is the same as the graph of -cos(2 theta).\n\nIt starts at (0, -1) , has an amplitude of 1, and has a period of pi radians which means it passes through (pi/2, 1)\n\nOr in degrees, it has a period of 180 and passes through (90, 1)
461233
In Euclidean plane geometry, π may be defined either as the ratio of a circle's circumference to its diameter, or as the ratio of a circle's area to the area of a square whose side is the radius. Advanced textbooks define π analytically using trigonometric functions, for example as the smallest positive x for which sin(x) = 0, or as twice the smallest positive x for which cos(x) = 0.\n\nAll these definitions are equivalent, they amount to the following numerical value of π, truncated to 50 decimal places:\n\n3.14159265358979323846264338327950288419716939937510
835259
I'll give you a hint and let you try to figure out the rest yourself (unless someone else tells you the exact answer). =)\n\nUse your trig identities:\n\ntan A = sinA/cosA\n\ncot A = 1/tanA or cot A = cosA/sinA
1128929
First off......do you know how to do basic trigonometry and use Snell's Law?  If you do, then I'll walk you through it.  Write me at fortitudinousskeptic@yahoo.com\nIf you don't know trig and Snell's law I'm not going to try to explain it.  I'm not that motivated.
299290
First is the spelling.  It's trigonometry.\n\nSecond is the question.  You would need to be more specific.  There are many good online sources for that.  Just google it and search the sites.  There will be some university level sites or some simpler ones too.
824701
Well maths is the foundation of most ares of science, especially physics, and physics relates to many jobs in fields like engineering etc. Trigonometry in maths at first seems to just relate to triangles, but apart from finding unknown sides and angles, it has many applications. the relationship between the sides of a triangle, in terms of sine, cosine and tangent apply to many areas of physics. You may have heard of trig graphs, and in physics, you can see how many things like waves, simple harmonic motion and AC current all relate to trigonometrical concepts, that is, looking at objects in motion in terms of a reference circle
135673
I'm not really sure of what your asking but if your talking about trigonometry (SOHCAHTOA)\nthen it's\n\nSin=opposite/hypotonuse\nCosine=ajacent/hypotonuse\nTangent=opposite/ajacent
880627
Do you mean verifying trig identities?\n\nTry: ask dr math\n\nIf you have a specific trig question, write back.\n\nGuido
728575
U should find out old class 9 Mathe. It can be helpful to u to understand easily basic of trigonometry i.e., 'Ө' and 'sine' in ur class standard.\nOld class 9 book can be available in old book shop. Find it at ur nearest old book shop.
20199
The basic idea behind trigonometry is that once you know the angles of a triangle, you'll know the ratios of the sides of the triangle.  And so if you know one side, you can use trig to find out the two other sides.\n\nSine, cosine, and tangent deal with right triangles.  They tell you the ratios of different pairs of sides in the right triangle.\n\nHere's a brief intro:\nhttp://opera.answers.com/trigonometry
1094719
It's quite dificult to explain trigonometry this way, so it;s better for you to have an electronic teacher, this teacher is at your service day or night, sun or rain and  you could find it\n\nhttp://aleph0.clarku.edu/~djoyce/java/trig/\n\nhttp://www.sosmath.com/trig/trig.html\n\nhttp://fergusmurray.members.beeb.net/trig.htm\n\nhttp://mathworld.wolfram.com/Trigonometry.html\n\ngood luck
571469
Trigonometry is basically about the relationships between angles and their corresponding ratios in distances.\n\nTrigonometry has many applications such as:\n\n- Navigation (Sextant)\n- Land surveying\n- Building\n\nIt is also used extensively in a number of academic fields, primarily:\n\n- Mathematics\n- Science\n- Engineering\n\nFor non-mathematicians and non-scientists applications, trigonometry is used in:\n\n- Measurement problems\n- Theory of music\n- Number theory\n- Fourier series\n- Fourier transforms\n- Statistics
680870
sounds like you need to use some basic trig functions.\n\nthe button "tan" on the calculator stands for tangent. the tangent of an angle of a right triangle (other than the right angle) is = to the ratio of the side opposite the angle to the side adjacent to the angle.\n\nthe button "sin" on the calculator stands for sine.  the sine of the angle of a right triangle is = to the ratio of the side opposite the angle to the hypotenuse.\n\nthe button "cos" on the calculator stands for cosine. the cosine of an angle is = to the ratio of the side adjacent to the angle to the hypotenuse.\n\nbasically, you decide which function to use that best fits the information given.  you enter the given angle in the calculater and press the appropriate function.  then you set that value (which you round off to the nearest ten-thousandth) equal to the appropriate ratio and then you solve.
13310
It's the limit of a type of convergent infinite sum (that's why it's symbol is an elongated 's').\n\nIt's applications range from finding the solutions to differential equations, being used to calculate an area, volume (in the sense we know it, and in a generalised space of n-dimensions).  In Fourier Analysis it's used to approximate functions using cos and sin, etc.  But, by far, the best use of it has to be answering exam questions.\n\nNot helpful, but fairly interesting.  So I thought.  I'll go now.