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Ksivusya [100]
3 years ago
12

Can someone help me with 9 and 11 please!

Mathematics
1 answer:
tamaranim1 [39]3 years ago
5 0

22222222222222222222222222222222222222

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alukav5142 [94]
1133/103=11 ft per floor.
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PLZ!!!
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16

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A bag contains 7 green marbles and 4 white marbles you select a marble at random what are the odds in favor of picking a green m
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Find all solutions to the equation (sinx-cosx)^2=1
svetoff [14.1K]

Answer:

x=\dfrac{\pi k}{2},\ k\in Z.

Step-by-step explanation:

Simplify the equation (\sin x-\cos x)^2=1:

\sin^2 x-2\sin x\cos x+\cos ^2x=1,\\ \\ (\sin^2x+\cos^2x)-2\sin x\cos x=1.\\

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we have

1-\sin 2x=1,\\ \\\sin 2x=0,\\ \\2x=\pi k,\ k\in Z,\\ \\x=\dfrac{\pi k}{2},\ k\in Z.

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3 years ago
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podryga [215]
Okay. So, what we do first is do the distributive property by multiply each number in the parenthesis by 3. When we do that, we get (6x + 12), because 3 * 2x is 6x and 4 * 3 is 12. Now, the numbers written out in long form is 5 + 6x + 12 + 6. 6x is in simplified form, because there is nothing that we can combine it with, but we do need to combine the whole numbers. 5 + 12 is 17, and 17 + 6 is 23. The expression in simplified form is 6x + 23. The answer is B.
3 0
3 years ago
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