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3 years ago

6

The radius of a circular sign is 12 inches. Equal parts of the the sign are painted red and yellow. How many square inches are p

ainted each colors?

1 answer:

neonofarm [45]3 years ago

6 0

The answer is 6 you always divide by 2 ‼️

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Use the inverse function-inverse cofunction

vivado [14]

Answer:

$arccot(x)'=-\frac{1}{1+x^2}$

Step-by-step explanation:

<u>Use implicit differentiation:</u>

$y=arccot(x)$

$cot(y)=x$

$\frac{1}{tan(y)}=x$

$\frac{cos(y)}{sin(y)}=x$

$\frac{dy}{dx}(\frac{cos(y)}{sin(y)})=\frac{dy}{dx}(x)$

$\frac{sin(y)(-sin(y))-cos(y)cos(y)}{sin^2(y)}*\frac{dy}{dx}=1$ (Quotient Rule: $\frac{d}{dx}(\frac{f(x)}{g(x)})=\frac{g(x)f'(x)-f(x)g'(x)}{(g(x))^2}$ )

$\frac{-sin^2(y)-cos^2(y)}{sin^2(y)}*\frac{dy}{dx}=1$

$\frac{-(sin^2(y)+cos^2(y))}{sin^2(y)}*\frac{dy}{dx}=1$

$\frac{-1}{sin^2(y)}*\frac{dy}{dx}=1$

$-csc^2(y)\frac{dy}{dx}=1$

$\frac{dy}{dx}=\frac{1}{-csc^2(y)}$

$\frac{dy}{dx}=-sin^2(y)$

$\frac{dy}{dx}=-sin^2(arccot(x))$

See the attached picture to understand how to evaluate the mixed composition of trig functions using a right triangle.

Therefore, the derivative of arccot(x) is $-\frac{1}{\sqrt{1+x^2}}$ .

4 0

2 years ago

Explain how you know which coins could be show 0.77 of a dollar

laila [671]

7 dimes+7 pennies
or 77 pennies
or 7 dimes+1 nickle+2 pennies
<u>3 different ways!!!</u>

4 0

3 years ago

Will give brainliest amswer ❤️

Fiesta28 [93]

Answer:

78.5 square units

Step-by-step explanation:

$d = 10 \implies \: r = \frac{10}{2} = 5 \\ area \: of \: circle \\= \pi {r}^{2} \\ = 3.14 \times {5}^{2} \\ = 3.14 \times 25 \\ = 78.5 \: {units}^{2} \\$

8 0

3 years ago

Read 2 more answers

Find the value of this expression if x = 1 and<br> y = -7.<br> x^2y/-9

Dmitry [639]

Answer:

math is hard for me but yeah a good place to find answers is here or ggl maybe search on gg and the at the end put answer key i do that a lot hope my

Step-by-step explanation:

explanation helps

3 0

3 years ago

Sally’s dance school had 60 students last year. This year there are only 48 students enrolled. By what percent did the enrollmen

Morgarella [4.7K]

Answer:

-20%

My brain is weird on how i figure it out but I divided 48 by 60 and got .80 so i just got the other whole to make it 1 so it is 20%. This is not the correct way to do this but this is how i got my answer.

8 0

3 years ago