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
Oduvanchick [21]
3 years ago
10

*giving brainliest*suppose cos(x)=-1/3, where pi/2=<x=<pi. what is the value of tan(2x)?​

Mathematics
1 answer:
qaws [65]3 years ago
4 0

Answer:

4√2/7

Step-by-step explanation:

Suppose cos(x)=-1/3, where pi/2≤x≤ pi

tan(2x) = sin(2x)/cos(2x)

Since sin2x = 2sinx cosx

cos 2x = 2cos²x-1

Substitute

tan(2x) = 2sinx cosx/ 2cos²x-1

Given cosx = -1/3

adjacent = -1

hyp = 3

opp = √3²-(-1)²

opp = √9-1

opp = √8

sinx = opp/hyp

sinx = √8/3

tan(2x) = 2sinx cosx/ 2cos²x-1

tan(2x) = 2(√8/3)(-1/3)/ 2(-1/3)²-1

tan2x= (-2√8/9 )÷ (2/9 - 1)

tan2x = -4√2/9 * 9/-7

tan 2x = 4√2/7

You might be interested in
Last winter, Anne was charged $838.35 for 9,315 KWh of electricity. What did her company charge per killowatt hour of electricit
DaniilM [7]
To solve this do:

838.35/9315= 0.09.

This means the company charged $.09 for every kilowatt of electricity used.
6 0
3 years ago
NEED HELP!! PLEASE PLEASE
Bezzdna [24]

Answer:

The answer is A

Step-by-step explanation:

hope this helps,

If you like my answer please give brainliest,

Happy Holidays!

6 0
3 years ago
What is the radius of a sphere with a volume of 12,348 π cubic feet?
vova2212 [387]

Answer:

Radius = 21

Step-by-step explanation:

Volume of a sphere = 4/3 * pie * radius^3

12,348 pie = 4/3 * pie * radius ^3

12,348 = 4/3 * radius^3

(12,348 * 3)/ 4 = radius^3

9261 = radius^3

radius = \sqrt[3]{9261}

radius = 21

5 0
3 years ago
Where is the axis on a quadrant
dezoksy [38]

Answer:

x axis and y axis divide the coordinate plane into four quadrants.

Step-by-step explanation:

If one coordinate is zero, then the point is located on the x-axis or the y-axis. If y coordinate is zero, then the point is located on the y-axis. If both coordinates are zero, then the point represents the origin.

8 0
4 years ago
Which decimal number is equal to 318 ? 0.167 0.16¯ 0.16¯¯¯¯ 0.167¯¯¯¯¯
skad [1K]

Answer:

3/18 = 1/6 =.16666666.....

.16(would be repeating)

your choice D and A are the same, and choice C and B are the same!

hope this helps!

7 0
3 years ago
Other questions:
  • Consider the diagram.<br> What is the length of segment AB?<br> A) 7<br> B) 9<br> C) 18<br> D) 25
    11·1 answer
  • The side of the parallelogram in the figure above are given in cm.
    8·1 answer
  • Ben’s bank account has only $34. Today he spent $45 on a new sweatshirt. What is the new balance in his bank account?
    5·2 answers
  • What is the perimeter and area of 9ft width and 8ft Long?
    11·1 answer
  • What is the Measure of angle f
    15·1 answer
  • Which of the following represents the set of possible rational roots for the
    14·1 answer
  • Sub to SZ Lexrn if that does not show search up shiyo on vr and first vid is them please help out , thx bye . If you do it cmt a
    9·1 answer
  • Please help me out :)
    6·1 answer
  • Select the correct answer. What is the domain of the function represented by this graph? the graph of a quadratic function y = x
    6·2 answers
  • You work 40 hours/week for 50 weeks and are given the option to be paid hourly or to go on salary. In which situation will you e
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!