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3 years ago

Help please, can you check my answer? 15 points

Mathematics

2 answers:

cupoosta [38]3 years ago

8 0

Answer:

it is right dear

Step-by-step explanation:

confirm mark me as a brain list pls

defon3 years ago

5 0

Yeah that’s correct

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Write each expression as an algebraic (nontrigonometric) expression in u, u > 0.

max2010maxim [7]

Answer:

$\displaystyle \sin\left(2\sec^{-1}\left(\frac{u}{10}\right)\right)=\frac{20\sqrt{u^2-100}}{u^2}\text{ where } u>0$

Step-by-step explanation:

We want to write the trignometric expression:

$\displaystyle \sin\left(2\sec^{-1}\left(\frac{u}{10}\right)\right)\text{ where } u>0$

As an algebraic equation.

First, we can focus on the inner expression. Let θ equal the expression:

$\displaystyle \theta=\sec^{-1}\left(\frac{u}{10}\right)$

Take the secant of both sides:

$\displaystyle \sec(\theta)=\frac{u}{10}$

Since secant is the ratio of the hypotenuse side to the adjacent side, this means that the opposite side is:

$\displaystyle o=\sqrt{u^2-10^2}=\sqrt{u^2-100}$

By substitutition:

$\displaystyle= \sin(2\theta)$

Using an double-angle identity:

$=2\sin(\theta)\cos(\theta)$

We know that the opposite side is √(u² -100), the adjacent side is 10, and the hypotenuse is u. Therefore:

$\displaystyle =2\left(\frac{\sqrt{u^2-100}}{u}\right)\left(\frac{10}{u}\right)$

Simplify. Therefore:

$\displaystyle \sin\left(2\sec^{-1}\left(\frac{u}{10}\right)\right)=\frac{20\sqrt{u^2-100}}{u^2}\text{ where } u>0$

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3 years ago

Which of the following represents a function?

Lyrx [107]

The image on the left represents a function. The image on the right does not as a function cannot have multiple variables for a single X quantity.

8 0

2 years ago

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What is the fraction of 0.79 in simplest form

Olin [163]

79/100 you can't reduce 79/100 so that would be the simplest form.

4 0

3 years ago

Read 2 more answers

Can someone help me with 2 please

mina [271]

Rectangle RSTU
P = 2(9+6) = 2 (15) = 30

R'S'T'U' scale 1/3 to
P of R'S'T'U' = 30/3 = 10

answer.
4. 10 units

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3 years ago

What is the solution to this equation?

WITCHER [35]

Answer:

A. x = 4

Step-by-step explanation:

$7x-2(x-10)=40\\7x-2x+20=40\\5x+20=40\\5x=20\\x=4$

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3 years ago