LIM (2-T + Sint) / (T + cost) processes than t → - ∞

LIM (2-T + Sint) / (T + cost) processes than t → - ∞

Because sin and COS are bounded functions, when t tends to infinity, they can be ignored just like 2. Finally, only - t and T are left, and the answer is - 1

Ask: Lim1 / T ln (2-cost-sint) (t = > infinity) forget. Ask steps, thank you!
Find: Lim1 / T ln (2-cost-sint) (t = > infinity)
I forgot. Thank you!

The molecule ln (2 - cost - Sint) is a bounded function
And the denominator t →∞
So the original formula = 0

March 1, 2011 is Tuesday. What day is October 1, 2011?

I think it's Saturday

What is the formula for grades one to six?

Definition theorem formula of primary school mathematics
Definition theorem formula
The area of triangle = base × height △ 2. Formula s = a × h △ 2
Square area = side length × side length formula s = a × a
The area of rectangle = length × width formula s = a × B
The area of parallelogram = base × height formula s = a × H
Area of trapezoid = (upper bottom + lower bottom) × height △ 2 Formula s = (a + b) H △ 2
Sum of internal angles: sum of internal angles of triangle = 180 degrees
Cuboid volume = length × width × height formula: v = ABH
Cuboid (or cube) volume = base area × height formula: v = ABH
Volume of cube = edge length × edge length × edge length formula: v = AAA
The formula of circle circumference = diameter × π: l = π d = 2 π R
The area of circle = radius × radius × π formula: S = π R2
Surface (side) area of a cylinder: the surface (side) area of a cylinder is equal to the circumference of the bottom multiplied by the height. Formula: S = ch = π DH = 2 π RH
Surface area of a cylinder: the surface area of a cylinder is equal to the circumference of the bottom multiplied by the height plus the area of the circles at both ends. Formula: S = ch + 2S = ch + 2 π R2
Volume of cylinder: the volume of cylinder is equal to the area of bottom multiplied by height. Formula: v = sh
The volume of the cone is 1 / 3 of the bottom surface × the product height. The formula is v = 1 / 3SH
The law of addition and subtraction of fractions: the fractions with the same denominator are added and subtracted, only the numerator is added and subtracted, and the denominator is not changed. The fractions with different denominators are added and subtracted first, and then added and subtracted
The multiplication rule of fractions: use the product of molecules as molecules and the product of denominators as denominators
Division of fractions: dividing by a number is equal to multiplying by the reciprocal of the number
Unit conversion
(1) 1 km = 1 km, 1 km = 1000 m, 1 m = 10 decimeter, 1 decimeter = 10 cm, 1 cm = 10 mm
(2) 1 square meter = 100 square decimeter 1 square decimeter = 100 square centimeter 1 square centimeter = 100 square millimeter
(3) 1 cubic meter = 1000 cubic decimeter 1 cubic decimeter = 1000 cubic centimeter 1 cubic centimeter = 1000 cubic millimeter
(4) 1t = 1000kg 1kg = 1000g = 1kg = 1kg
(5) 1 hectare = 10000 square meters, 1 mu = 666.666 square meters
(6) 1 liter = 1 cubic decimeter = 1000 ml 1 ml = 1 cubic centimeter
On the calculation formula of quantity relation
1. Unit price × quantity = total price
2. Single output × quantity = total output
3. Speed × time = distance
4. Work efficiency × time = total amount of work
Definition theorem formula of primary school mathematics (2)
1、 Arithmetic
1. Additive commutative law: two numbers are added to exchange the position of addends, and the sum remains unchanged
2. The law of combination of addition: add three numbers, add the first two numbers first, or add the last two numbers first, and then the same as the third number
The sum of three numbers is constant
3. Commutative law of multiplication: when two numbers are multiplied, the position of commutative factor is unchanged
4. The law of combination of multiplication: when three numbers are multiplied, the first two numbers are multiplied, or the second two numbers are multiplied, and then the third number is multiplied, so that their product remains unchanged
5. Law of distribution by multiplication: multiplication of two numbers and the same number, two addends can be multiplied by the same number respectively, and then the two products can be added up, and the result remains unchanged. For example: (2 + 4) × 5 = 2 × 5 + 4 × 5
6. The nature of division: in division, the divisor and the divisor expand (or reduce) the same multiple at the same time, and the quotient remains unchanged. 0 divided by any number that is not 0 will get 0
7. Equation: the equation that the value on the left side of the equal sign is equal to the value on the right side of the equal sign is called the equation. Basic properties of the equation: if both sides of the equation multiply (or divide) the same number at the same time, the equation still holds
8. Equations: Equations with unknowns are called equations
9. Unary linear equation: the equation with an unknown number and the degree of the unknown number is once is called unary linear equation
Learn the example method and calculation of linear equation of one variable, that is, give the formula with χ and calculate
10. Fraction: the unit "1" is divided into several parts equally, which means such a part or fraction
11. The law of addition and subtraction of fractions: add and subtract fractions with the same denominator, only add and subtract molecules, and the denominator remains unchanged. Add and subtract fractions with different denominators, and then add and subtract
12. Comparison of fractions: compared with fractions with the same denominator, fractions with larger numerator are larger and fractions with smaller numerator are smaller. Compared with fractions with different denominators, fractions with the same denominator are divided first and then compared. If the numerator is the same, fractions with larger denominator are smaller
The numerator is the product of the numerator of a fraction and the integral, and the denominator remains unchanged
14. Fraction multiplied by fraction, using the product of multiplication of molecules as the molecule and the product of multiplication of denominators as the denominator
15. Dividing a fraction by an integer (except 0) is equal to multiplying the fraction by the reciprocal of the integer
True fraction: the fraction whose numerator is smaller than denominator is called true fraction
17. False fraction: the fraction whose numerator is larger than denominator or whose numerator and denominator are equal is called false fraction. False fraction is greater than or equal to 1
18. With fraction: it is called with fraction to write the false fraction in the form of integer and true fraction
19. Basic properties of fraction: the numerator and denominator of fraction multiply or divide by the same number (except 0), and the size of fraction remains unchanged
A number divided by a fraction is equal to the number multiplied by the reciprocal of the fraction
21. Number a divided by number B (except 0) is equal to the reciprocal of number a multiplied by number B

How much is 42 times the unknown plus 25?
Write the formula by solving the equation

42 times the unknown plus 25 the unknown equals 67
42*x+25x=67x

Write mathematical expression into C language expression
 

(1) 3.26*exp(x)+1.0/3.0*pow((a+b),4)(2) 2*sqrt(x)+(a+b)/(3.0*sin(x))(3) g*m1*m2/(r*r)(4) double pi = 3.142.0*pi*r + pi*r*r + cos(45.0*pi / 180.0 )(5) loan * rate * pow( (1+rate) ,month ) / ( pow( (1+r...

(x-4) square minus 5 (x-4) + 4 equals 0
(x-4) square minus 5 (x-4) + 4 equals 0
How do you calculate that?

Let x-4 = y
Then the original problem is reduced to Y & sup2; - 5Y + 4 = 0
The solution is y = 4 or y = 1
Then bring back the original problem and get x = 8 or x = 5

Solving equation (X-2) ^ 2-2 (X-2) = 0 by factorization

（x-2）^2-2(x-2)=0
（x-2）(x-2-2)=0
（x-2）(x-4)=0
x1=2,x2=4

How many seconds is 2880 seconds 48 minutes equal to

2880 + 48 * 60 = 2880 + 2880 = 5760 (seconds)

4x-2.3=9.

4X=9.7+2.3
4X=12
X=3