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3 years ago

How would you go about solving this? This is the half angle and double angle identities unit if that helps

Mathematics

1 answer:

erastovalidia [21]3 years ago

5 0

Yes you are right. This does involve more trig that physics. So let's review the math for a bit.

Cos(2x) = cos^2(x) - sin^2(x) Substitute 1 - sin^2(x) for cos^2(x)

Cos(2x) = 1 - sin^2(x) - sin^2(x)

cos(2x) = 1 - 2*sin^2(x) Now we need to solve for sin^2(x)

2sin^2(x) = 1 - cos(2x)

sin^2(x) = (1 - cos(2x))/2

Now all we need do is make a few substitutions.

x = ωt

Substitute (1 - cos(2ωt))/2 for sin^2(ωt)

P = (Io)^2 *R * (1 - cos(2ωt))/2

P = (Io)^2*R/2 - (Io)^2*R cos(2ωt) / 2

I think if you follow it carefully, you will find that the answer is

B <<<<< Answer.

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Write an explicit function for f(x) <br> Can anyone help me with this please I’ll mark as brainliest

stiv31 [10]

Answer:

Explicit Function:

Any function which when expressed in terms of the independent variable is called an explicit function. For example, if we write y=f(x)

, then the dependent variable y is given in terms of the independent variable x by the function f(x). Thus y=f(x) is an explicit function. But, g(x,y)=c

is not explicit as it is a combination of both x and y. Such a function is called implicit.

Step-by-step explanation:

What is meant by implicit function?

An implicit function is a function that is defined by an implicit equation. That means the equation contains several variables, including dependent and independent. In other words, it is an equation that relates one of the variables, recognized as the value of the function, with the others regarded as the arguments.

What is an explicit function?

An explicit function is a function that is represented in terms of an independent variable. For example, y = 4x – 7 is explicit where y is a dependent variable and is dependent on the independent variable x.

How do you know if a function is implicit?

If a function is written in the form f(x, y) = 0, we can say that the given function is implicit.

What is implicit function differentiation?

We differentiate or find the derivative for both sides of the equation in implicit function differentiation.

What is explicit and implicit?

In general, “explicit” means clearly stated, whereas “implicit” refers to proposed and not stated directly.

5 0

3 years ago

(3/5y^4)^-2 simplify this please

Usimov [2.4K]

$(\frac{3}{5}y^4)^{-2}=(\frac{5}{3})^2y^{4\times-2}=\frac{25}{9y^8}$

8 0

3 years ago

Kevin weighs himself and discovers he weighs 78,900 grams. How many kilograms does Kevin weigh?

faltersainse [42]

Answer:

He would weigh 78.9 kilograms. hope this helps.

3 0

3 years ago

-) Colin is playing a video game. He wins 25 points for each gold coin he finds. His goal is to win

Dima020 [189]

Answer:

Step-by-step explanation:

25g>200

so A

if my answer helps please mark as brainliest.

8 0

3 years ago

Need Answer Immediately!!!!!

Fiesta28 [93]

<h2>Answer:</h2>

y = $\frac{-5}{4}$ x + 3

<h2>Step-by-step explanation:</h2>

As shown in the graph, the line is a straight line. Therefore, the general equation of a straight line can be employed to derive the equation of the line.

The general equation of a straight line is given by:

y = mx + c <em>or </em>-------------(i)

y - y₁ = m(x - x₁) -----------------(ii)

Where;

y₁ is the value of a point on the y-axis

x₁ is the value of the same point on the x-axis

m is the slope of the line

c is the y-intercept of the line.

Equation (i) is the slope-intercept form of a line

Steps:

(i) Pick any two points (x₁, y₁) and (x₂, y₂) on the line.

In this case, let;

(x₁, y₁) = (0, 3)

(x₂, y₂) = (4, -2)

(ii) With the chosen points, calculate the slope <em>m</em> given by;

m = $\frac{y_2 - y_1}{x_2-x_1}$

m = $\frac{-2-3}{4-0}$

m = $\frac{-5}{4}$

(iii) Substitute the first point (x₁, y₁) = (0, 3) and m = $\frac{-5}{4}$ into equation (ii) as follows;

y - 3 = $\frac{-5}{4}$ (x - 0)

(iv) Solve for y from (iii)

y - 3 = $\frac{-5}{4}$ x

y = $\frac{-5}{4}$ x + 3 [This is the slope intercept form of the line]

Where the slope is $\frac{-5}{4}$ and the intercept is 3

8 0

3 years ago