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I need the formulae for finding the angle of a parabola for my paper

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  • swethasalunk Mar 10, 2008

    i need detailed formulae for the normal and angles as relative to a paraboloid.

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Theta=taninv(y/(x-a))

Find more in http://mathworld.wolfram.com/Parabola.html

:)

Have a nice day

I hope, my suggestion was helpful

Posted on Mar 15, 2008

(y - k)2 = 4a(x - h)

Posted on Mar 09, 2008

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Finding the area of a triangle in the coordinate Plane


I find the easiest way to solve these is to sketch them first (I'm a visual learner;) We get a nice right-angled triangle, with the right-angle at B. The formula for the area of a triangle is 1/2 * base* height or (base * height)/2.

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If we use BC as the base, the length is 9-4 or 5. The height is 6-2 or 4.

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Do you mean how to work out the sides and angles? The most common formula is

A / sin A = B / sin B = C / sin C

Here you need 2 sides and one angle, or 2 angles and one side. There are several others, see

http://www.geom.uiuc.edu/docs/reference/CRC-formulas/img86.gif

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How can you find the correct window settings on a TI-83 plus


Set the windows dimensions to Standard (Xmin=-10, Xmax=10, Ymin=-10, Ymax=1: Both are parabolas, and the interesting part is the neighborhood of the extremum (maximum or minimum) and the location of the zero.
The third curve varies very fast, so you will have to reduce the interval Xmin, Xmax. to see the neighborhood of the origin, where the minimum is. (Minimum is at (0,0).

9abca233-31b3-4139-a8bf-b12b72a73c92.png

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How do you find the formula given the x and y coordinates?


Formula for what? A straight line? A circle? A parabola? Or something else?

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Minimum or maximum values of a parabola


Follow these steps: graph the parabola and after that 2nd then CALC keypad. To find extreme value of the function select 3: min or 4: max options. Select the function and set left bound, right bound(using left and right arrows) by pressing ENTER. You can see images bellow for all these steps for the y=-2x^2+5x+3


1. step: graphing parabola
3_9_2012_7_34_06_pm.jpg


2. step: left or lower bound
3_9_2012_7_36_01_pm.jpg


3. step: right or upper bound
3_9_2012_7_37_33_pm.jpg


4.step: extreme value of the function
3_9_2012_7_39_04_pm.jpg

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2 Answers

Minimum or maximum value of a parabola


Follow these steps: graph the parabola and after that 2nd then CALC keypad. To find extreme value of the function select 3: min or 4: max options. Select the function and set left bound, right bound(using left and right arrows) by pressing ENTER. You can see images bellow for all these steps for the y=-2x^2+5x+3

1. step: graphing parabola
3_9_2012_7_34_06_pm.jpg

2. step: left or lower bound
3_9_2012_7_36_01_pm.jpg

3. step: right or upper bound
3_9_2012_7_37_33_pm.jpg

4.step: extreme value of the function
3_9_2012_7_39_04_pm.jpg

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Find length of right triangle given one angle an one length


Formulas relating to right angled triangles are:
Sine = perpendicular divided by hypotenuse
Cosine = base divided by hypotenuse
Tangent = perpendicular divided by base
Sine Tangent and Cosine functions are all available in Excel

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Is the calculator suppossed to have "DEG" in the bottom right hand corner? I am trying to enter the numbers for the compound interest formula and I keep getting "Syntax Error" Is it because of the...


The DEG indicator on the screen is a reminder to the user that the ANGLE unit is in degrees. You can change the angle unit to Radian or Grads. That does not have any incidence on other calculations. It only affects the computation of trigonometric functions : sine, cosine, tangent, arc cosine, arc sine and arctangent. So if you have syntax error in the calculation of the interest formula, I can assure you it has NOTHING to do with the angle unit.
I do not see the formula you are trying to use, so I cannot be sure what you are doing wrong.
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  2. Missing right parenthesis
  3. A right parenthesis is inserted at the wrong place.
  4. Incorrect use of the power function
I suggest you write the correct formula on paper and enter it step by step. A step is defined by an operation: multiplication, division, power. Start with the content of parentheses and work toward the outside. The last result is always the one stored in Answer memory (Ans).

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1 Answer

Graphing parabola


Parabolas are forms of X^2. Go to [Y=], then put in the formula of the parabola that you want.

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