The following ratios form a proportion. 5/18 = 10/90 True or False 13 pts.

Mathematics

2 answers:

gizmo_the_mogwai [7]3 years ago

6 0

Answer:

False

Step-by-step explanation:

brilliants [131]3 years ago

5 0

Answer:

True

Step-by-step explanation:

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Verify the identity. Show your work. cos(α - β) - cos(α + β) = 2 sin α sin β

s2008m [1.1K]

$\bf \textit{Sum and Difference Identities}
\\\\
cos(\alpha + \beta)= cos(\alpha)cos(\beta)- sin(\alpha)sin(\beta)
\\\\
cos(\alpha - \beta)= cos(\alpha)cos(\beta) + sin(\alpha)sin(\beta)\\\\
-------------------------------$

$\bf {cos(\alpha - \beta)-cos(\alpha+\beta)}=2sin(\alpha)sin(\beta)
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\stackrel{\textit{left-hand-side}}{[cos(\alpha)cos(\beta) + sin(\alpha)sin(\beta)]-[cos(\alpha)cos(\beta)- sin(\alpha)sin(\beta)]}
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\underline{cos(\alpha)cos(\beta)} + sin(\alpha)sin(\beta)-\underline{cos(\alpha)cos(\beta)} + sin(\alpha)sin(\beta)
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7 0

3 years ago

I need help on this

ElenaW [278]

The proof is because it has a right angle.... I think :)

5 0

3 years ago

Write the following fractions in order of size.

MrMuchimi

Answer:

E,A,C,B,D

Step-by-step explanation: