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polet [3.4K]
3 years ago
9

Solve the equation for solutions in the interval [0, 2 π). Use algebraic methods and give exact values. Support your solution gr

aphically. cos2x = 0

Mathematics
2 answers:
Anvisha [2.4K]3 years ago
7 0

Answer:

Step-by-step explanation:

● cos 2x = 0

We khow that Pi/2 equals 0.

So

● 2x = Pi/2 or 2x= -Pi/2

Then:

● x = Pi/4 or x = -Pi/2

So the solutions are:

● x = Pi/4 + 2×k×Pi

● or x = -Pi/4 + 2×k×Pi

Where k is an integer

The picture below has a graphical solution

● Pi/4 is approximatively 0.785 and -Pi/4 is approximatively -0.785

● the output of both Pi/4 and -Pi/4 is 0

So our answer was righr

SSSSS [86.1K]3 years ago
4 0

Answer:

45° or 135°

Step-by-step explanation:

Cos 2x = 0

2x = cos^-1 0

2x = 90° or 270°

x= 45° or 135°

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Step-by-step explanation:

x=5,y=-1

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answer G .33

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You have to pay $32.75 for an item after a 25% markup. What was the original price?
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It should be around 24.56 i rounded tho
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HELP ASAP <br><br><br> Find the Difference. SHOW YOUR WORK<br><br> 3x + 5 - (2x + 2)
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Answer:

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Step-by-step explanation:

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3 years ago
A student solved this problem and said the answer is 1 10  quart. Lila used 72 5  quarts of paint to paint her room. Renee used
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Answer:

b

Step-by-step explanation:

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Read 2 more answers
What is the equation of a line that passes through points (2,0) and (6,-4)
romanna [79]

Answer:

y = -x + 2

Step-by-step explanation:

We are asked to find the equation of a line

Step 1: find the slope

We are given two points

( 2 , 0) ( 6 , -4)

m = (y_2 - y_1 )/ (x_2 - x_1)

x_1 = 2

y_1 = 0

x_2 = 6

y_2 = -4

Insert the values

m = ( -4 - 0) / ( 6 - 2)

m = -4 / 4

m = -1

Step 2 : substitute m into the equation

y = mx + c

y = -1x + c

Step 3: substitute any of the two points into the equation

Let's pick ( 6 , -4)

x = 6

y = -4

y = mx + c

y = -1x + c

-4 = -1(6) + c

-4 = -6 + c

c = -4 + 6

c = 2

Step 4: substitute c = 2 into the equation

y = mx + c

y = -x + c

y = -x + 2

5 0
3 years ago
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