why do v really need trigonometry in maths ?
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
303805
I don't see how components are necessary.  \n\n"r" and "v" are just shorthand for r(t) and v(t), assuming we are looking at position (r) and velocity (v) as time varying "vectors".  And v(t) is just the time derivative of r(t) (by DEFINITION), that is, v(t) is DEFINED as r'(t).\n\nSo there isn't any actual CONTENT in expanding them into components. We are just choosing different ways to symbolize the quantities involved and there isn't anything to prove.
363631
The Pythagorean didn't find these. In fact, trigonometry didn't get started until Hypparchus in the second century BC (Pythagorus was in the 6th century BC). But Hypparchus didn't use the trig functions we use today. The sine function wasn't used until about the early 5th century AD in India.
105824
Trigonometry.  The good old days when I still loved math... ahhh!
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.
513183
Yes.  Assuming that you are familiar with 2-dimensional rectangular (Cartesian) vectors, (x,y) axes, then the polar coordinates are given by \nr=(positive)square root of (x^2+y^2), and\ntheta=the angle whose tangent = y/x, where\n\nr is the length of the vector and\ntheta is the direction of the vector with respect to a given reference direction.\n\nAddition and subtraction of vectors are simpler in rectangular coordinates while multiplication and division of vectors are simplified by transforming to polar coordinates.\n\nPolar coordinates are even simpler if radians are used for the angles instead of degrees.
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
582807
hey u know maths is just a game at your fingur tips if u learn the formulae and stick to u r basics well.i too hate trigonometry but geometry,u can play a lot of games with it.I will give u some websites where u can learn them easily\n\nhttp://www.answermath.com/tips/trigonometry-sine.htm\nhttp://www.answermath.com/tips/trigonometry-cosine.htm\nhttp://www.answermath.com/tips/trigonometry-tangent.htm\n\nhey do not forget to give me ten points
757310
It's odd that you ask this question cos I am positive that, all things being equal, mathematicians are able to calculate their final day.  I have heard that they have secret meetings in a place known only as Pascal's Triangle. While enjoying apple cider and pi they discuss factors and variables and plot their finite days on the X-Y axis.\n  *  There is an acute case of irrational subtracting going on here. It is a bad sine.
555535
Provided a right triangle and one of the acute angles, you need the length of one of the triangle's sides to be able to compute sine, cosine or tangent.
727921
I've read the Trigonometry for Dummies and the Calculus for Dummies books, both were quite helpful. There is also an algebra workbook for dummies, but it's probably not worth getting if you're taking an algebra class.
338103
I would be very surprised if you could do that. Algebra I, algebra II, geometry, and trigonometry classes are available separately because they are very different from each other. They also get harder as you go up to the next level.
402565
another good question for you is why did they use the variable x for the horizontal axis and why did they use the variable y for the vertical axis and the Z for the third dimension....well your answer is just to assign it some variable because it had to be assigned so there could be some order...if you take a multivariable calculus class you will see that there is no assigned order of the x,y and z axis' because it is all relative to how you are looking at it you just have to assign each one and generally the x and y axis' are orthogonal to the z axis....anyways m was probably just used because it is not used in other places so that is what they assigned it
277182
Trigonometric functions can be found in all fields of mathematics, science and engineering. The unique aspect of mathematical functions is that in using higher mathematical techniques such as differentiation or integration, trigonomtric functions often feature in the solution. As a result, trigonometric functions can be found in all the fields listed above. Their use goes far beyond triangles!
545673
there are lots of medical devices taking ideas from trigonometry.\none simple example is hip prostheses..the angle at which it should be designed implanted and all are decided by trignometric techniques. I can give you more examples if you r really interested
104581
It takes practice!  And its like a puzzle.  Just use the main trig identities as reference and a good math tutor.  Unfortunately, this place isn't the best place to ask that kind of question because we are limited by text explainations and trig identities need a lot more than that!
862258
I am taking College Algebra with Trigonometry and that is hard, so I know Calculus is real hard. That is a hard question to figure out.