A formula for calculating circular equation It is some simple formulas, for example: know the coordinates of the two intersection points of the circle and the diameter, can directly solve the formula of the circle equation, and so on

A formula for calculating circular equation It is some simple formulas, for example: know the coordinates of the two intersection points of the circle and the diameter, can directly solve the formula of the circle equation, and so on

Know the two diameters of a circle
(x-x1)(x-x2)+(y-y1)(y-y2)=0
X1, X2, Y1 and Y2 are the coordinates of the end points of the two diameters respectively
Parametric equation of circle
x=a+RcosA
y=b+RsinA
a. B is the center of the circle
R is the radius and a is the parameter
But this one doesn't work very well

A formula for finding the radius of a circle

What is the relationship between the conditions of limit, continuity and differentiability?
I know: one of the conditions of continuity is the existence of limit. What about other connections?

Derivable must be continuous, otherwise not necessarily
"Continuous" is equivalent to "left and right limits exist and are equal"

It is known that a is a symmetric matrix of order n and B is an antisymmetric matrix of order n. It is proved that ab-ba is a symmetric matrix and ab + Ba is an antisymmetric matrix

The singular and plural forms of words ending with th
When to add s to the plural, when to be the original form, whether to add es, what are the rules, and how to remember them,
Words ending with th

If the end of a word ends with an e, usually an S is added
If the end of the word is a noun ending in O, it is a noun with life, plural and es
For example: to the complex number to es
Lifeless plus
Remember this rule and you'll deal with the plural of nouns ending in o

What is the algorithm of LG

If the B power of a (a > 0, and a ≠ 1) is equal to N, that is, ab = n, then the number B is called the logarithm of n with a as the base, denoted as: Logan = B, where a is called the base of logarithm, and N is called the true number

The plural of the following words
He this her paper water rice family knife baby

them
these
them/their
paper
water
rice
families
knives
babies

How to draw the visual picture of parallelogram with oblique two survey drawing method

(1) The line segment parallel to the X axis is drawn parallel to the X 'axis in the visual graph, and the length remains unchanged; the Z axis also remains unchanged
(2) The line segment parallel to y axis is drawn parallel to y 'axis in the visual graph, and the length is half of the original
In the visual image, the bottom of the square is parallel to the X axis, and the diagonal is parallel to the Y axis

120 word English composition
About 120 words, the material is self-determined

Our exam content is about happiness so, what is happiness thousandsof people may have thousandsof kind of answers. But, as for me, happiness is When I w...

In △ ABC, point D is on AB, BD = AC, m and N are the midpoint of BC and ad respectively, and the extension line of Mn and the extension line of Ca intersect at point E

Extend nm to F, make MF = nm, connect CF, connect DM, extend CF to g, connect AG
Easy to get: CF = BN, CG = BD = AC, DN = FG = an ab parallel CF, so the quadrilateral anfg is a parallelogram
So: AG is parallel to EF, so AE = FG, that is AE = an