3 years ago

Solve for 0-360 degrees. 2cos^2x + cosx = 0

Mathematics

1 answer:

Ann [662]3 years ago

4 0

Answer:

60, 90, 270, 300 degrees

Step-by-step explanation:

a = cos(x)

2(a^2) + a = 0

a(2a + 1) = 0

a = 0 OR 1/2

so...

cos(x) = 0 OR cos(x) = 1/2

x = 90 or 270 OR x = 60 or 300

You might be interested in

a recipe calls for 6 cups of brown sugar for every 2 cups of white sugar. How many cups of brown sugar is required for every cup

sammy [17]

Answer:

You need 3 cups of brown sugar for every 1 cup of white sugar.

Step-by-step explanation:

To find the smallest amount possible, divide both numbers by the smaller number. So, 6 (the amount of brown sugar) Divided by 2 equals 3, and 2 (the amount of white sugar) Divided by 2 equals 1.

3 0

4 years ago

Water drains from a barrel at a constant rate. The graph and table show how the amount of water in the barrel changes with time.

lana66690 [7]

Answer:

Option C is correct.

Step-by-step explanation:

We have been given the graph

The graph is not of exponential function

Therefore, option A and B are discarded.

Now, We can see the graph is starting from 37

And the difference between Amount of water from the table is 19-22 that is -3

So, the graph is arithmetic

So, applying the formula $a_n=a+(n-1)d$ ; d is common difference here we have d= -3

$a(n)=37-3(n-1)$

Therefore, option C is correct.

3 0

3 years ago

Which equation represents the statement"one-fourth more than a number is equal to two-thirds?

Taya2010 [7]

Answer:

x + 1/4 = 2/3

Step-by-step explanation:

one-fourth more than a number

x + 1/4

4 0

3 years ago

Read 2 more answers

What is the smallest number of degrees needed to rotate a pentagon around its center onto itself?

mel-nik [20]

Like to get back to where it started? In that case 360

7 0

3 years ago

What is. . .<br> 7/9 + 5/6 · 1/3

SIZIF [17.4K]

Answer:

1 1/18

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers