1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ANEK [815]
3 years ago
8

Find sin(u/2) if tan(u)=-7.721 and u is in quadrant 4

Mathematics
1 answer:
morpeh [17]3 years ago
7 0

Answer:

.6601

Step-by-step explanation:

to find u, which we assume is an angle of course, we can take arctan of both sides.  so arctan(-7.721) = -1.4420.  this angle is in quadrant 4, but it is not in the range.  In this instance you just go around the circle again, or add 2pi, which gets us 4.8412.  You can check and you get the same answer if you take the tangent of either.

So now we have a number in the appropriate range  in the appropriate quadrant.  That means we have the correct angle.  The question asks what is sine of that angle cut in half.  so sin(4.8412/2), which gets you your answer.  let em know if something didn't make sense.  

You might be interested in
It has been estimated that 1000 curies of a radioactive substance introduced at a point on the surface of the open sea would spr
Zanzabum
<span>1000 meters per second is the answer 

radius =25.23Km

(t)= days 

</span>
8 0
3 years ago
A vehicle travels on a highway at a rate of 65 mi/h how long does it take the vehical to travel 25 mi?
katrin [286]
Use the velocity formula and solve for time.v=d/t
t=d/v

Substitute your variables and solve.
65 mi/hr = 65 / 3600 mi/second
25 mi / ( 65/3600) = 1384.6 seconds
4 0
3 years ago
a bag contains 16 red coins , 8 blue coins , and 8 green coins. A player wins by pulling a red coin from the bag. Is this game f
scZoUnD [109]

Answer:

Step-by-step explanation:

there are a total of 16+8+8=32 coins in bag

16 out of 32 are red

player wins by pulling a red coin

assume it is a single pull, the winning probability = 16/32 = 1/2

so it is 50/50 chance n hence a fair game

4 0
3 years ago
Read 2 more answers
30 kg of tomatoes cost $93. how much would 14 kg cost
katovenus [111]

Answer:

$43.4

Step-by-step explanation:

Let's say x is the cost per kilgram

30x = 93

x = 3.1

14x = 43.4

8 0
3 years ago
You are recreating a scale drawing at a different scale. The original scale is 1 cm : 8 m. The new scale is 1 cm : 2 m. In the o
densk [106]

Answer:

The segment should be 36 centimeters long

Step-by-step explanation:

Let us use the ratio method to solve the question

∵ The original scale is 1 cm : 8 m

∵ In the original drawing, the length of a segment is 9 centimeters

→ By using the ratio method

→  cm   :  m

→  1      :  8

→  9     :  x

→ By using the cross multiplication

∵ 1 × x = 9 × 8

∴ x = 72 m

∴ The actual length of the segment is 72 m

∵ The new scale is 1 cm : 2 m

∵ The actual length of the segment is 72 m

→ By using the ratio method

→  cm   :  m

→  1      :  2

→  y      :  72

→ By using the cross multiplication

∵ y × 2 = 1 × 72

∴ 2y = 72

→ Divide both sides by 2 to find y

∴ y = 36

∴ The drawing length of the segment is 36 cm in the new scale

∴ The segment should be 36 centimeters long

6 0
3 years ago
Other questions:
  • Your monthly living expenses are $1500 on an income of $1,650 per month. Your goal is to have an emergency fund of 4 times your
    11·2 answers
  • Translate the following statement into a mathematical equation:
    8·1 answer
  • The product of -5 and a number is 30. What is the number ?
    10·2 answers
  • Solve the problem and then click on the correct graph.<br><br> y = |x|
    6·1 answer
  • Can anyone help please
    9·1 answer
  • Choose the equation that is not a linear function.
    10·1 answer
  • a cylindrical tinfull of engine oil has a diameter of 12cmand the height of 14cm.the oil is poured into a rectangular tin 16cm l
    12·1 answer
  • I’ll give you brainliest, please help!
    7·1 answer
  • The perimeter of the rectangle below is 168 units. Find the length of side AB.
    7·1 answer
  • At Johnson's Pharmacy, tissue boxes can be purchased as single boxes or in packs of three boxes. During January, Johnson's sells
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!