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aivan3 [116]
4 years ago
13

If y=2cos(x/2) then d^2y/dx^2 =

Mathematics
1 answer:
Sladkaya [172]4 years ago
5 0
We first need dy/dx.

dy/dx = -2sin(x/2)(1/2)

dy/dx = -sin(x/2)

We now find d^2y/dx^2.

d^2y/dx^2 = -cos(x/2)(1/2)

d^2y/dx^2 = -(1/2)cos(x/2)
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I need help on this one.
Flura [38]

Answer:

1) 180 is a straight line, so 180 - 118 = <em>62</em>

2) 180 degrees are in a triangle, so 180 - (62) - 73 = <em>45</em>

3) 180 is a straight line, so 180 - 73 = 107. There are 180 degrees in a triangle, so 180 - 49 - 45 = <em>86</em>

4 0
3 years ago
Multiply. Use an area model to illustrate each product. a) 2/3 and 15
NeX [460]

Answer:

10

Step-by-step explanation:

multiply 15 by the numerator (2) so you should have 30/3 then divide by the denominator (3) for an answer of 10

4 0
3 years ago
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How many flowers, spaced every 4 in., are needed to surround a circular garden with a 100-ft radius?
DedPeter [7]

Answer:

1885 flowers

Step-by-step explanation:

Given that:

Radius, r of circle = 100 feets

The Circumference of the circke is thus ; 2πr

C = 2 * π * 100

C = 628.31853 feets

Converting feets to inches

1 foot = 12 inches

628.31853 feets = 628.31853 * 12 = 7539.8223 inches

If flowers are spaced at 4 inches :

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Circumference of circle / spacing

7539.8223 / 4

= 1884.9555 flowers

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7 0
3 years ago
What is 362,584 rounded to the nearest?
Monica [59]
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3 0
3 years ago
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What is the common ratio of the geometric sequence pt.1​
MaRussiya [10]

Answer:

The common ratio is -6

Step-by-step explanation:

The given sequence is

\frac{1}{18},-\frac{1}{3},2,-12,...

The common ratio can be found using any two consecutive terms of the geometric sequence.

r=\frac{-12}{2}=-6

The correct answer is the last choice.

6 0
3 years ago
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