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zhuklara [117]
3 years ago
12

How do I find the exact value of cos 4pi/3?

Mathematics
2 answers:
Leona [35]3 years ago
8 0
We can use the calculator to determine the answer of finding the exact value of cos 4 pi/3. In this case, we use a calculator and set the mode to radians. The answer is equal to -1/2. We can also verify this by converting the angle to degrees which is 240 degrees. The answer still is -1/2.
Alchen [17]3 years ago
4 0
Hello,

cos ( \dfrac{\pi}{3} )= \dfrac{\sqrt{3}}{2} \\\\

cos(\dfrac{4\pi}{3} )=-cos (\dfrac{\pi}{3} )=-\dfrac{\sqrt{3}}{2} \\\\
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4 years ago
A bicyclist travels at a constant speed of 12 miles per hour for a total of 45 minutes. Use set notations for the domain and ran
Mama L [17]

A bicyclist travels at a constant speed of 12 miles per hour for a total of 45 minutes

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We know distance formula

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Read 2 more answers
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Nina [5.8K]

Answer:

Option F

Step-by-step explanation:

F). x + y = 3 -------(1)

    x - 3y = -2 --------(2)

    Equation (1) minus equation (2)

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    4y = 5

    y = 1.25

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G). x + y = 3 --------(1)

    x + y = -2 --------(2)

    Both the equations represent parallel lines.

    There are no solutions of the given equations.

H). x - 3y = -2 -------(1)

     x + y = -2 -------(2)

    Equation (2) minus equation (1)

    (x + y) - (x - 3y) = -2 - (-2)

     4y = 0

     y = 0

    Since, 0 is neither positive nor negative, y will be neither positive nor negative.

J). x + y = 3 -------(1)

    x - y = 3 --------(2)

    Equation (1) - Equation (2)

    (x + y) - (x - y) = 3 - 3

    2y = 0

    Hence, y is neither negative nor positive.  

    Therefore, Option F is the answer.

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3 years ago
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