how do you convert degrees to radians?
116874
For the layman ... here's a website that does it for you:\n\nhttp://www.mathwizz.com/practical/page6.htm\n\nFor someone who wants to go through the process:\nIt is really quite simple if you remember two things. Working in \ndegrees, one revolution is 360 degrees.  When working in radians, \nthere are two pi(2 times pi) radians in one revolution.  So it becomes \nevident that \n\n  360 degrees = 2 pi radians\n\nso that  \n\n  1 degree = 2 pi/360 radians = .0175 rad (approx)\nor  \n  1 radian = 360/(2 pi) = 57.3 degrees (approx)\n\nTo convert radians into degrees you should multiply by 180/pi.\nTo convert degrees into radians you should multiply by pi/180.
35682
pi doesn't equal 22/7 or 3.14.  those are just approximates, but fairly close approximates.\n\npi is how many radians there are in a half a circle-approximately 22/7 or 3.1415 radians.  a radian is the degree where the radius of the circle equals the outside segment of the circle at that degree.  (about 59 or so degrees if i remember correctly)
263848
cot = o/a\ncsc = r/o\n\no = opposite side\na = adjacent side\nr = radius\n\ncalculate csc(2x) in terms of o and r.\nSubstitute o/a for cot(x) and substitue the value you determine for csc(2x) \nmultiply these, then convert to a trig function in terms of x.\n\nIf you know trig identities better than I do, you can reduce this expression using identities, without resorting to o, a, and r.  However, either route will work.
800991
180 degrees is equivalent to pi radians. Think about a circle (even better the unit circle). \n\nOne whole revolution is 360 degrees, or 2 pi, so 180 degrees is half of 360, thus it's pi. \n\nThe coordinates of pi on the Unit Circle is (-1, 0), if you wanted to know.
96716
Turn it any number of degrees!\nMaybe you mean only 0 or 360 degrees, because the 'T' or 't' has no rotation symmetry.
247689
Use analytical trig (hint: sin function).  That should give you the answer you are looking for.
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.
1143408
After turning ON the calculator press on the GRAPH button.  Then press F1 on top left corner.  Enter you equation.  Press GRAPH button again and then press F5 located on top right corner and your calculator should be graphing it.  If you like to change to graphing mode from radians to degrees, press 2ND button (yellow button on the left side) and then MORE.  Move down using cursors until it says RADIAN/DEGREES.  You can choose either option and then press ENTER.  If you have any other question about the calculator, let me know.
830100
'x= rcost\ny=rsint\n\nand r= sqrt(x^2+y^2)\nt=arctan(y/x)\nso\nif x=2, and y=2, then r= sqrqt(4+4)=sqrt(8)\nand t=arctan(2/2) = arctan(1) = pi/4
968004
To change from Cartesian coordinates (x,y) to Polar Coordinates (r, theta), you need to perform the following substitutions:\n\nx = r*cos(theta)\ny = r*sin(theta)\n\nand:\n\nr = sqrt(x^2+y^2)\ntheta = arctan(y/x)\n\nThe general form of the integral substitution is:\n\ndouble integral[f(x,y)dydx] = double integral[f(r*cos(theta), r*sin(theta))*r*dr*d(theta)]\n\nBelow is a website with some examples\n\n------------\n\nHope this helps
965129
One way to convert degrees into radians is to set up a proportion.  180 degrees is equal to pi radians (360 degrees= 2 pi radians).\n\nHere is an example of how to convert 30 degrees.\n\n180/ pi = 30/x\nUsing cross multiplication, you have 180x = 30 pi.\nAfter dividing both side by 180 you have x = 30 pi/180.\nThis can be simplified to 3 pi/18 = pi/6.\n\nSo for your example of 150 degrees.  The method is similar.\n\n180/ pi = 150/x\nCross multiplication.  180x =150pi.\nx = 150 pi/180.\nx = 15 pi/18   Now divide the top and bottom by three  = 5 pi/6\n\nGood luck with your exam and I hope this helps!
620468
Theta usually designates an angle. Radians are one means of measuring angles. Your question is equivalent to asking how to convert from inches to length.
554946
Use the equation d = sqrt((y2-y1)^2 + (x2-x1)^2)\nyou get d = sqrt((5-2)^2 + (3-(-1))^2)\n=> d = sqrt(9 + 16)\n=> d = 5 units
915176
First of all, latitude first, then longitude.\n\nThere are TWO common ways:\n\nUse the numer of degrees followed by N(orth) or S(outh),\nthen the numer of degrees followed by E(ast) or W(est).\n\nEx) 30*N, 90*W\n\nUse only the number of degrees (positive for North-negative for South), followed by the number of degrees (positive for East-negative for West)\n\nEx) 30*, -90*
610173
Radians are based on pi.  A radian is equivalent to 1/(2pi).  Because it is just a ratio of another constant, it isn't based on a physical standard unlike feet, meters, etc.\n\nIt's just like degrees.  A degree is 1/360th of a complete circle, but nobody needs to define 360 with a physical object.  We all know what 360 is.  Similarly we know what 2pi is (it's the circumference of a unit circle).
6838
∫xSec(x²)²dx = .5Sin(x²)/Cos(x²)
154864
If you have a TI graphing calculator...your calculator is probably similar to mine.  For my TI, I simply hit the MODE button and arrow down to ANGLE, and hit the right arrow to switch it from RADIAN to DEGREE.