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alexdok [17]
2 years ago
9

This one I just don't know ._.

English
1 answer:
algol132 years ago
6 0

Answer:

B is the answer

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Answer 1 is B and answer 2 is B
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Read this sentence about Della from "The Gift of the Magi." Once she faltered for a minute and stood still while a tear or two s
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She is sad. that is what the sentence describes her as

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I will make you brainlist if you help me the 2 question by explain them i swear i will make you brainlist
Xelga [282]

★ Formula Applied :

\begin{gathered}\sf \bullet\ \; cos^2x-sin^2x=cos2x\\\\\to\ \sf \pink{sin^2x-cos^2x=-cos2x}\end{gathered}

\begin{gathered}\bullet\ \; \sf sin2x=2.sinx.cosx\\\\\to \sf \blue{sinx.cosx=\dfrac{sin2x}{2}}\end{gathered}

\displaystyle \bullet\ \; \sf \int \dfrac{dx}{x}

\bullet\ \; \sf \ln (ab)=\ln a+\ln

★ Explanation :

\begin{gathered}\displaystyle \sf \int \dfrac{sin^2x-cos^2x}{sinx.cosx}dx\\\\\to \sf \int \dfrac{-cos2x}{\frac{sin2x}{2}}dx\\\\\to \sf \int \dfrac{-2cos2x}{sin2x}dx\end{gathered}

Lets use substitution method ,

Let , u = sin2x

⇒ du = 2.cos2x.dx

\begin{gathered}\to \displaystyle \sf \int \dfrac{-du}{u}\\\\\to \sf -\int \dfrac{du}{u}\\\\\to \sf -ln|u|\\\\\end{gathered}

\to \sf \red{-ln|sin2x|+c}

\to \sf - \ln |2sinx.cosx|+c

\to \sf - \ln |sinx.cosx|+(\ln 2+c)

\leadsto - \sf \red{\ln |sinx.cosx|+c}\ \; \bigstar

★ Alternate Method :

\displaystyle \sf \int \dfrac{sin^2x-cos^2x}{sinx.cosx}

\displaystyle \to \sf \int \left( \dfrac{sin^2x}{sinx.cosx}-\dfrac{cos^2x}{sinx.cosx}\right)dx

\begin{gathered}\displaystyle \to \sf \int \left( \dfrac{sinx}{cosx} -\dfrac{cosx}{sinx} \right)dx\\\\\to\ \sf \int (tanx-cotx)dx\\\\\to \sf \int tanx.dx-\int cotx.dx\\\\\to \sf ln|secx|-ln|sinx|+c\end{gathered}

\to \sf ln\left| \dfrac{secx}{sinx}\right|+c

\begin{gathered}\to \sf ln\left| \dfrac{1}{sinx.cosx} \right|+c\\\\\end{gathered}]

\leadsto \sf \pink{-ln|sinx.cosx|+c}\ \; \bigstar

4 0
3 years ago
What did Hrothgar and his council (unsuccessfully) do to stop Grendel
Oksanka [162]

Answer: How does he overcome the obstacle? His sword is useless against the monster. First, he fights with his bare hands and his mail shirt keeps her from piercing his skin. Then, he found the ancient sword with magic of its own mounted on the wall of the monster's lair.

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Help!!
lukranit [14]

Answer: C is the correct answer, "Iambic pentameter"

Explanation:

Shakespeare was well known for his use of Iambic pentameter in his writings/plays. The lines of poetry that contains iambs is known as an iambic meter. Iambs are groups of syllables that will have an unstressed syllable and a stressed syllable. The unstressed syllable is always going to be followed by the stressed one.

A few of the stressed syllables in this poem are;

  • forth
  • these
  • pair
  • star
  • throws
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