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valkas [14]
1 year ago
13

Help with Trigonometric identities

Mathematics
1 answer:
Gre4nikov [31]1 year ago
3 0

Answer:

Option 2

Step-by-step explanation:

Since theta is in the third quadrant, the sine of theta is negative.

By the Pythagorean identity,

\sin \theta=-\frac{\sqrt{105}}{13}

So, using the double angle formula for sine, we get that

\sin 2\theta=\frac{16\sqrt{105}}{169}

You might be interested in
4-20. When Susan's brother went to college, she and her two sisters evenly
Zigmanuir [339]

Each sibling got 1 poster, 8 CDS and 72 books.

<h3>How the belongings were divided </h3>

Since the belongings were divided equally, each sibling would get the same amount of belongings. In order to determine the belongings each person got, we would divide each possession by 3.

  • Number of poster each person got = 3/3 = 1
  • Number of books each person got = 216
  • Number of CDs each person got = 24 / 3 = 8

To learn more about division, please check: brainly.com/question/194007

8 0
2 years ago
Sally works 40 hours a week and makes $20 an hour, but her kids are in child care each day and the day care center charges her $
Maslowich

Answer:

$11.25

Step-by-step explanation:

Multiply the number of hours she works by how much she gets paid per hour.

800

Multiply 50 times 7 (50 being the amount charged for her kid and 7 being the days of the week)

350

Subtract the 350 from the 800

450

Divide the 450 by the number of hours worked per week

450/40

Answer: 11.25

So Sally actually makes 11.25 per hour.

5 0
3 years ago
Find the missing length of the triangle.
egoroff_w [7]

Step-by-step explanation:

apply Pythagorean theorem. if a^2 + b^2 = c^2 then

b = √(15^2 - 9^2) = 12.

12 is answer

5 0
2 years ago
Given the point and the slope, write the function in point-slope form:<br> (2, -5); m = 2/3
pshichka [43]
Y=2/3x+(-5)
hope this helps
3 0
2 years ago
What is the value of the expression when n = 3?<br> GO<br> - 2 n(5 + n-8-3n)
lukranit [14]

Answer:

54

Step-by-step explanation:

since n = 3

= -2n ( 5n+n-8-3n)

= -2 (3) ( 5+(3)-8-3(3) )

= -6 (5+3-8-9)

= -6 (5-5-9)

= -6 (-9)

= 54.

8 0
3 years ago
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