Tangent Length Help

Subject Areas

Tools / Misc

bCalc

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scrnGC2: Calc Input

scrnGC3: f(x) Plot Input

scrnGC4: g(x) Plot Input

The inputs above will be hidden when the program finally gets launched. Currently, I am not hiding them even when you close the calculator. The purpose of the inputs is to help in debugging. This allows you to enter simple code on the calculator screen but the program translates the input to javascript math. Give it a try and see if you notice any obvious problems or have suggestions for improvements.

gCalc

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Select precision* of answer:

Select angle mode:

Enter expression to evaluate here:

The answer is shown below:

Enter function to be plotted:

f(x) =

Enter 2nd function, if needed:

g(x) =

Change or reset the x-y scaling below:

x_min =

x_max =

y_min =

y_max =

Accuracy Disclaimer

The javascript math object methods used for this calculator are not accurate for very large or very small numbers. In particular, the trigonometric functions may yield very small answers that should actually be zero or very large answers that should be infinite. This typically occurs at 90� or pi/2 intervals.

DO NOT USE WHERE HIGH PRECISION IS REQUIRED. USE AT YOUR OWN RISK.

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Tangent Length Help

If a tangent and a secant intersect exterior of a circle, then the square of the length of the tangent segment equals the product of the lengths of the secant segment and the external secant segment.

VT � = VX • VW

• Determine the total secant segment length.

• Determine the secant segment length exterior to the circle.

Note the similarity between the tangent side of the equation and the secant side.

Tangent segment length = VT and the length of the tangent segment outside the circle = VT.

Secant segment length = VX and the length of the secant segment outside the circle = VW.