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2 years ago

Send help sisters lol

Mathematics

2 answers:

AnnyKZ [126]2 years ago

7 0

If a square root is not a perfect square, it is considered an irrational number. None of these are perfect squares, so all of the given square roots are irrational. This means your answer would be "Both are irrational". I hope this helps :)

rewona [7]2 years ago

7 0

sqrt 3 + sqrt 2

sqrt 3 + sqrt 6 are both irrational numbers

Rational Number:

It is a number that can be expressed as the quotient or fraction of two integers, a numerator p and a non-zero denominator q. Since q may be equal to 1, every integer is a rational number. The set of all such numbers are referred to as 'the rationals', which is denoted as 'Q'. The decimal expansion of a rational number always either terminates after a finite number of digits or begins to repeat the same finite sequence of digits over and over.

Irrational Number:

A real number that is not rational is called irrational. Irrational numbers include √2, π, e, and θ. The decimal expansion of an irrational number continues without repeating. A set of real numbers is uncountable. Hence, almost all real numbers are irrational.

Hope that helps!!!!! : )

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What is a fraction five sentences or more

sukhopar [10]

A fraction is a way of showing a division by showing the number you are dividing and the number you are dividing by. The number you are dividing is called the numerator. It goes above a horizontal line. The number you are dividing by is the denominator and it goes below the horizontal line. When typing, a slash takes the place of the horizontal line.

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2 years ago

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Original price: ? Percent of discount: 25% Sale price: $45

My name is Ann [436]

Answer:

Original price is 11.25

Step-by-step explanation:

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What is the product of 65(cos(14°)+ i sin(14°)) and 8(cos(4°)+ i sin(4°))

saveliy_v [14]

The product of the complex numbers 65(cos(14°)+ i sin(14°)) and 8(cos(4°)+ i sin(4°)) is 520[cos(18) + isin(18)]

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

Complex number is in the form z = a + bi, where a and b are real numbers.

The product of the complex numbers 65(cos(14°)+ i sin(14°)) and 8(cos(4°)+ i sin(4°)) is:

z = 65 * 8 [cos(14 + 4) + isin(14 + 4)] = 520[cos(18) + isin(18)]

Find out more on equation at: brainly.com/question/2972832

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2 years ago

A pure substance that is made of only one kind of atom is called _________.

mariarad [96]

A pure substance that is made of only one kind of atom is called an element.

An element is a pure substance, which means it is made up of only ONE kind of atom.

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3 years ago

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HELP ASAP FOR BRAINLIEST!

salantis [7]

Answer:

make sure calculator is in "radians" mode
use the cos⁻¹ function to find cos⁻¹(.23) ≈ 1.338718644

Step-by-step explanation:

A screenshot of a calculator shows the cos⁻¹ function (also called arccosine). It is often a "2nd" function on the cosine key. To get the answer in radians, the calculator must be in radians mode. Different calculators have different methods of setting that mode. For some, it is the default, as in the calculator accessed from a Google search box (2nd attachment).

The third attachment shows a graph of the cosine function (red) and the value 0.23 (dashed red horizontal line). Everywhere that line intersects the cosine function is a value of A such that cos A = 0.23. There are an infinite number of them. You need to know about the symmetry and periodicity of the cosine function to find them all, given that one of them is A ≈ 1.339.

The solution in the 4th quadrant is at 2π-1.339, and additional solutions are at these values plus 2kπ, for any integer k.

Also in the third attachment is a graph of the inverse of the cosine function (purple). The dashed purple vertical line is at x=0.23, so its intersection point with the inverse function is at 1.339, the angle at which cos(x)=0.23. The dashed orange graph shows the inverse of the cosine function, but to make it be single-valued (thus, a function), the arccosine function is restricted to the range 0 ≤ y ≤ π (purple).

_____

So, the easiest way to answer the problem is to use the inverse cosine function (cos⁻¹) of your scientific or graphing calculator. (Always make sure the angle mode, degrees or radians, is appropriate to the solution you want.) Be aware that the cosine function is periodic, so there is not just one answer unless the range is restricted.

I keep myself "unconfused" by reading cos⁻¹ as the angle whose cosine is. As with any inverse functions, the relationship with the original function is ...

cos⁻¹(cos A) = A

cos(cos⁻¹ a) = a

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3 years ago