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Talja [164]
3 years ago
14

What are all the exact solutions of square root2 cosx -1 = 0 for 0 <= x <= 2pi? Give you answer in radians.

Mathematics
2 answers:
nadya68 [22]3 years ago
7 0

Answer:

Option 2 - x=\frac{\pi}{4},\frac{7\pi}{4}  

Step-by-step explanation:

Given : Expression \sqrt{2}\cos x-1=0 for 0\leq x\leq 2\pi              

To find : What are all the exact solutions of expression?

Solution :  

First we simplify the expression,

\sqrt{2}\cos x-1=0

\sqrt{2}\cos x=1            

\cos x=\frac{1}{\sqrt{2}}      

The general solution is            

x=\frac{\pi}{4}+2\pi n,\frac{7\pi}{4}+2\pi n          

For 0\leq x\leq 2\pi                  

The solution is  x=\frac{\pi}{4},\frac{7\pi}{4}  

Therefore, Option 2 is correct.

Allushta [10]3 years ago
4 0

Answer:

pi/4 and 7pi/4

Step-by-step explanation:

attached

you're welcome :>

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8_murik_8 [283]

Answer:

20/5

Step-by-step explanation:

hello I'm confused so yea

4 0
3 years ago
Read 2 more answers
Which choices are correct when determining the distance between −56 and 69?
Gnesinka [82]

The choices that are correct when determining the distance between −56 and 69 are |-56 - 69| and 125 units

<h3>How to determine the choices that are correct when determining the distance between −56 and 69?</h3>

The endpoints are given as

−56 and 69

The distance between the endpoints is calculated using

Distance = |Difference between  endpoints|

So, we have:

Distance = |-56 - 69|

Evaluate

Distance = 125

Hence, the choices that are correct when determining the distance between −56 and 69 are |-56 - 69| and 125 units

Read more about number line at

brainly.com/question/4727909

#SPJ1

6 0
2 years ago
if the sum of a number and nine is doubled, the result is seven less than the number. find the number.
avanturin [10]
X=the number we have to find.
This expression "2(x+9)" is when the sum of a number and nine is doubled.
If the result is seven less than the number, we will have: x-7

We can suggest the following equation:
2(x+9)=(x-7)
2x+18=x-7
2x-x=-7-18
x=-25

answer: the number would be:  -25.
3 0
3 years ago
Simplify 22w/55 <br><br> 2/5 <br> 22/55 <br> 2w/11 <br> 2w/5
tangare [24]

Answer:

2w/5

Step-by-step explanation:

Divide whole numbers by 11,leave the variable.

4 0
3 years ago
Read 2 more answers
Solve for a.
Shalnov [3]

Answer:

the answer is -3

Step-by-step explanation:

1. add the -4 to 10 (-10 + 4)

2. -6= 2a

3. divide both sides by 2

4. -3= a

hope this helps

3 0
3 years ago
Read 2 more answers
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