3 years ago

Solve for w.

Mathematics

1 answer:

svlad2 [7]3 years ago

3 0

Answer:

w = 0, 5

Step-by-step explanation:

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4-(11/3)/4-(2/3) how do i solve this

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Answer: 0.1 or $\frac{1}{10}$

Step-by-step explanation:

$\frac{4-\frac{11}{3} }{4-\frac{2}{3} }$

= $\frac{1}{10}$

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Step-by-step explanation:

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laila [671]

Answer:

Step-by-step explanation:

Complementary angles are two angles whose measures add to 90°.

m<CFD = 150° - 100° = 50°

m<EFD = 180° - 150° = 30°

Sum = 80°

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m<DFE = m<EFD = 30°

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2 years ago

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Step-by-step explanation:

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3 years ago

HELP ON THIS PROBLEM!! Solve the following 0deg< x< 360deg: cos x= cos 2x

blsea [12.9K]

Answer:

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

Step-by-step explanation:

Use identities to set the equation up as a quadratic

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

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

$0=2u^2-u-1\\\\0=(2u+1)(u-1)$

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

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

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

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2 years ago