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IrinaK [193]
3 years ago
10

Help me please urgent

Mathematics
1 answer:
Lilit [14]3 years ago
6 0
The inscribed angle is always half of the central angle. 
So 60÷2=30
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the radius of a circle is 10 centimeters. what is the area of a sector bounded by a 90° arc? give the exact answer in simplest f
Alex787 [66]
I hope this isn't too late! You can find the answer to this by first finding the area of the circle, A=πr². So since the radius is 10, we input that into the equation to get π100. Now, there is 360° in a circle and a sector of 90° is 1/4 of it. So to answer the question all you have to do is find 1/4 of the area of the circle. 

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6 0
3 years ago
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For the function given, state the middle line; f(t) = 40cos (80t + 20)
Digiron [165]

In the standard form of the equation

\\ \ f(t)=Acos[b(t\pm c)]+k\\ \\

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Hence middle line=0

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