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Ipatiy [6.2K]
3 years ago
6

Find an exact value. cosine of nineteen pi divided by twelve.

Mathematics
2 answers:
zaharov [31]3 years ago
4 0
The answer is -0.083333333333333
mihalych1998 [28]3 years ago
4 0

Answer:

-0.0833

Step-by-step explanation:

\frac{cos^19(\pi)}{12}=-\frac{1}{12} = -0.0833

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Priyanka and Ethan were asked to find an explicit formula for the sequence -3,-14,-25,-36,...
irga5000 [103]

Answer:

a_{n} = 8 - 11n

Step-by-step explanation:

These are the terms of an arithmetic sequence with n th term

a_{n} = a + (n - 1)d

where a is the first term and d the common difference

here a = - 3 and

d = - 14 - (- 3) = - 14 + 3 = -11, thus

a_{n} = - 3 - 11(n - 1)

                        = - 3 - 11n + 11

                        = 8 - 11n

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3 years ago
The dot plots show the number of hours a group of fifth graders and seventh graders spent playing outdoors over a one-
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Step-by-step explanation:

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3 years ago
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Ksivusya [100]

Answer:

Step-by-step explanation:

Get things yo7 need so that you know what you Nkomo

8 0
3 years ago
0.1 to 0.2? It's a increase, decrease type thing.​
galben [10]

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5 0
2 years ago
50 POINTS
Marina86 [1]

vi is going in the positive direction (up). (That's my choice). a (acceleration) is going in the minus direction (down). The directions could be reversed.

Givens

vi = 160 ft/s

vf = 0 (the rocket stops at the maximum height.)

a = - 9.81 m/s

t = ????

Remark

YOu have 4 parameters between the givens and what you want to solve. Only 1 equation will relate those 4. Always always list your givens with these problems so you can pick the right equation.

Equation

a = (vf - vi)/t

Solve

- 32 = (0 - 160)/t Multiply both sides by t

-32 * t = - 160 Divide by -32

t = - 160/-32

t = 5

You will also need to solve for the height to answer part B

t = 5

vi = 160 m/s

a = - 32

d = ???

d = vi*t + 1/2 a t^2

d = 160*5 + 1/2 * - 32 * 5^2

d = 800 - 400

d = 400 feet

Part B

You are at the maximum height. vi is 0 this time because you are starting to descend.

vi = 0

a = 32 m/s^2

d = 400 feet

t = ??

formula

d = vi*t + 1/2 a t^2

400 = 0 + 1/2 * 32 * t^2

400 = 16 * t^2

400/16 = t^2

t^2 = 25

t = 5 sec

The free fall takes the same amount of time to come down as it did to go up. Sort of an amazing result.

6 0
3 years ago
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