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alex41 [277]
3 years ago
14

12.54 greater than less than or equal to 1.254

Mathematics
2 answers:
Anna [14]3 years ago
8 0
12.54 Is greater than 1.254

12.54 > 1.254
Natalka [10]3 years ago
7 0
12.54 is greater than 1.254
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Which of the following angles is coterminal with - 2pi/3
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Answer:

\frac{2\pi }{3} +x=2\pi

x=2\pi -\frac{2\pi }{3}

=\frac{4\pi }{3}

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3 years ago
Solve 0.25[2.5x + 1.5(x – 4)] = –x.
zheka24 [161]

Answer:

X = 0.75

Step-by-step explanation:

0.25[2.5x + 1.5(X-4)]= -X

0.25[2.5x + 1.5x - 6] = -x

0.25[4x -6] = -x

1x + x = 1.5

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3 years ago
HELP ON THIS PROBLEM!!<br><br> Solve the following 0deg&lt; x&lt; 360deg: cos x= cos 2x
blsea [12.9K]

Answer:

x=0^\circ,120^\circ,240^\circ,360^\circ

Step-by-step explanation:

<u>Use identities to set the equation up as a quadratic</u>

\cos x=\cos 2x;\:0^\circ \leq x \leq 360^\circ\\\\\cos x=2\cos^2 x-1\\\\0=2\cos^2 x-\cos x-1

<u>Make the substitution u=cos(x) and solve the quadratic</u>

<u />0=2u^2-u-1\\\\0=(2u+1)(u-1)

\displaystyle 0=2u+1\\\\0=2\cos x+1\\\\-1=2\cos x\\\\-\frac{1}{2}=\cos x\\\\120^\circ,240^\circ=x

0=u-1\\\\0=\cos x-1\\\\1=\cos x\\\\0^\circ,360^\circ=x

Hence, x=0^\circ,120^\circ,240^\circ,360^\circ

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Answer:

C and E

Step-by-step explanation:

Just did it.

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3 years ago
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