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enicole10
06.04.2020 •
Mathematics
A circle with circumference 6 has an are with a 20° central angle.
What is the length of the arc?
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Ответ:
AHH! Geometry!
Thanks!
The arc has a length of 1/3
Step-by-step explanation:
So you first start off with this:
This is because a circle is 360 degrees, and we are talking about a 20 degree arc.
Simplifying, we get![\frac{1}{18}](/tpl/images/0584/1777/540bb.png)
So then, you multiply the circumference with this "factor"
Hope this helps!
P.S. Stay Safe during quarantine!
Ответ:
Step-by-step explanation:
1/(1 - p + p²) - 1/(1 + p + p²) - 2p/(1 - p² + p⁴) =
[ (1 + p + p²)-(1 - p + p²)/(1 - p + p²)(1 + p + p²) ] - 2p/(1 - p² + p⁴) =
2p/(1 + p + p² - p - p² - p³ + p² + p³ + p⁴) - 2p/(1 - p² + p⁴) =
2p/(1 + p² + p⁴) - 2p/(1 - p² + p⁴) =
[ 2p(1 - p² + p⁴) - 2p( 1 + p² + p⁴) ]/(1 + p² + p⁴)(1 - p² + p⁴) =
(2p - 2p³ + 2p⁵ - 2p - 2p³- 2p⁵) / (1 - p² + p⁴ + p² - p⁴ + p⁶ + p⁴ - p⁶ + p⁸) =
-4p³ / (1 + p⁴ + p⁸)