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2 years ago

HELPPPP PLEASEEEE will give brainliest

Mathematics

1 answer:

ycow [4]2 years ago

8 0

Answer:

I think it's the 3rd or fourth one. I'm not positive tho

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Which is not a solution of sin 20 = 1?<br> A = 90<br> B = 45<br> C = 225<br> D = - 135

koban [17]

If you plug in 90 into theta, the expression becomes sin(180), which has a value of zero. Therefore 90 cannot be a solution to this equation. Hope this helps.

6 0

1 year ago

For what positive values of k does the function y=sin(kt) satisfy the differential equation y''+144y=0 ?

lina2011 [118]

Answer:

The positive value of k that the function y = sin(kt) satisfies the differential equation y'' + 144y = 0 is +12

Step-by-step explanation:

To determine the positive values of k that the function y = sin(kt) satisfy the differential equation y''+144y=0.

First, we will determine y''.

From y = sin(kt)

y' = $\frac{d}{dt}(y)$

y' = $\frac{d}{dt}(sin(kt))\\$

y' = kcos(kt)

Now for y''

y'' = $\frac{d}{dt}(y')$

y'' = $\frac{d}{dt}(kcos(kt))$

y'' = $-k^{2}sin(kt)$

Hence, the equation y'' + 144y = becomes

$-k^{2}sin(kt)$ + $144(sin(kt))$ $= 0$

$(144 - k^{2})(sin(kt)) = 0$

$(144 - k^{2})= 0$

∴ $k^{2} = 144\\$

$k =$ ± $\sqrt{144}\\$

$k =$ ± $12$

∴ $k = +12$ or $-12$

Hence, the positive value of k that the function y = sin(kt) satisfies the differential equation y'' + 144y = 0 is +12

7 0

3 years ago

HELP HELPPPP PLEASEE

maks197457 [2]

Answer:

f(n)=o.15n. is you answer

5 0

3 years ago

Read 2 more answers

There are 32 fishes in a tank. 25% of them are gold fish. How many of yhem are gold fish? Write and solve a proportion.

Sveta_85 [38]

25%of 32 should be written as 32•25%.then you convert 25%to a decimal wich is 25/100=0.25,last you multiply 32• .25=8 . 8 of them aregoldfish

5 0

2 years ago

What’s the correct answer answer asap

barxatty [35]

Answer:

I believe the answer is B, it makes the most sense

Step-by-step explanation:

3 0

1 year ago

HELPPPP PLEASEEEE will give brainliest ​

HELPPPP PLEASEEEE will give brainliest