Consider f(x)=cos^2x+2cosx over one complete period beginning with x=0

1 answer:

3 0

Period is from 0 to 2pi

take the deritivive then take it again
we get f''(x)=-4cos²(x)-2cos(x)+2

it is negative between 0 and pi/3 and also between 5pi/3 and 2pi

concave down in the interval
$[0, \frac{ \pi }{3}]$ U $[\frac{ 5\pi }{3},2\pi]$

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denis23 [38]

Answer:

25.18%

Step-by-step explanation:

The problem is asking for the Annual Percentage Rate (APR). This rate refers to the interest rate that the person will be paying every year.

First, you need to get the 5% amount of cash from $2,410.

So, $2,410 × 5% (0.05) = $120.50

You have to subtract the answer from $2,410, in order to get the answer.

So, $2,410 - $120.50 = $2,289.50 (this refers to the 5% of the cash price)

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So, divide $2,289.50 by 36 months, the answer is $63.60 per month.

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