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Nataliya [291]
3 years ago
8

The distance from Jamestown to Kenneville is 180 miles, the distance from Kenneville to Elizabeth City is 300 miles, and the dis

tance from Elizabeth City to Jamestown is 240 miles. Which of the following equations could NOT be used to determine if the lines connecting the towns form a right triangle?
A.180 squared plus 300 squared equals 240 squared,
B.300 squared minus 240 squared equals 180 squared,
C.80 squared plus 240 squared equals 300 squared,
D.300 squared minus 180 squared equals 240 squared
Mathematics
1 answer:
Marina86 [1]3 years ago
6 0

Answer:

B the anser is B

Step-by-step explanation:

you hafto to do it like B bc its the most comen sens one

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Taking the square root of both sides gives two possible cases,

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Recall that

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If \alpha=2x and \beta=\dfrac\pi4, we have

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so in the equations above, we can write

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Then in the first case,

\sqrt2\sin\left(2x+\dfrac\pi4\right)=1\implies\sin\left(2x+\dfrac\pi4\right)=\dfrac1{\sqrt2}

\implies2x+\dfrac\pi4=\dfrac\pi4+2n\pi\text{ or }\dfrac{3\pi}4+2n\pi

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and in the second,

\sqrt2\sin\left(2x+\dfrac\pi4\right)=-1\implies\sin\left(2x+\dfrac\pi4\right)=-\dfrac1{\sqrt2}

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\implies2x=-\dfrac\pi2+2n\pi\text{ or }-\pi+2n\pi

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Then the solutions that fall in the interval [0,2\pi) are

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