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Yanka [14]
3 years ago
13

Find the coordinates of the point on the unit circle measured 3 units clockwise along the circumference of the circle from (1, 0

). Round your answer to four decimal places.
Anyone knows how to do this? I would really appreciate it!
Mathematics
1 answer:
Virty [35]3 years ago
8 0
I'm in high school so you're screwed
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See question in attached photo.​
statuscvo [17]

9514 1404 393

Answer:

  (a, b) = (-2, -1)

Step-by-step explanation:

The transpose of the given matrix is ...

  A^T=\left[\begin{array}{ccc}1&2&a\\2&1&2\\2&-2&b\end{array}\right]

Then the [3,1] term of the product is ...

  (A\cdot A^T)_{31}=\left[\begin{array}{ccc}a&2&b\end{array}\right]\cdot\left[\begin{array}{ccc}1&2&2\end{array}\right]=a+2b+4

and the [3,2] term is ...

  (A\cdot A^T)_{32}=\left[\begin{array}{ccc}a&2&b\end{array}\right]\cdot\left[\begin{array}{ccc}2&1&-2\end{array}\right]=2a-2b+2

Both of these terms in the product matrix are 0. We can solve the system of equations by adding these two terms:

  (a +2b +4) +(2a -2b +2) = (0) +(0)

  3a +6 = 0

  a = -2

Substituting for 'a' in term [3,1] gives ...

  -2 +2b +4 = 0

  b = -1

The ordered pair (a, b) is (-2, -1).

8 0
3 years ago
Using the image above, what is the measure of Angle J? Round to the nearest hundredth
Brilliant_brown [7]

Answer:

<u>∠J = 31.06°</u>

Step-by-step explanation:

Taking the inverse sin function :

  • sin ∠J = 1.6/3.1
  • J = sin⁻¹ (0.516)
  • <u>∠J = 31.06°</u>
5 0
2 years ago
Which is the difference of 21 1/4 - 18 2/4<br> A 2 1/4 B 2 2/4 C 2 3/4 D 3 1/4
PSYCHO15rus [73]
So when you change the mixed numbers into improper fractions, they become 85/4 and 74/4. Your new problem is 85/4-74/4. Basically 85-74. That equals 9. So the improper fraction answer is 9/4. We now make that back into a mixed number, creating 2 1/4, or A.
8 0
3 years ago
Twice a number (n) is the same as 5 less than 3 times the number. What is the value of (n)?
irina [24]
2n = 3n - 5 (get all of n on one side by subtracting)
-1n = -5 (when you get here you have to divide by -1 to make n positive)
n = 5
8 0
3 years ago
If 21 out of 100 patients have high cholesterol, what percent of the patient population has high cholesterol?
makkiz [27]

Answer: 21%

Step-by-step explanation:

Percent by definition is based on "out of 100." If 21 out of 100 has high cholesterol, then the percentage is 21%

5 0
3 years ago
Read 2 more answers
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