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
vitfil [10]
3 years ago
12

Trigonometry

Mathematics
2 answers:
inessss [21]3 years ago
7 0

Answer:

±√(11/18)

Step-by-step explanation:

sinx = 5/6

  • applying the trigonometric rule sin²x + cos²x = 1
  • so to get cos²x = 1- sin²x

sinx = 5/6

sin²x = (5/6)² = 25/36

  • 1-sin²x = 1-25/36 = 36-25 /36 = 11/36

  • cos ²x = 11/36

cos x = ±√(11/36)

cos 2x = 2 x±√(11/36) = ±√(11/18)

Fiesta28 [93]3 years ago
5 0

Answer:

-7/18

Step-by-step explanation:

cos(2x) = 1 - 2sin²x

cos(2x) = 1 - 2(5/6)²

= 1 - 2(25/36)

= 1 - 25/18

= -7/18

You might be interested in
Please help me I am struggling :((
Ierofanga [76]

Answer:

Multiply the width to the length

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
samantha threw an apple out of a window from the tenth floor of her appartment building. the equation y = -16t^2+120 can be used
ella [17]
Answer:
time taken = 2.74 seconds

Explanation:
We are given that:
y = -16t² + 120 models the situation where:
y is the floor number
t is the time taken for the apple to hit the ground

We are also given that the floor number (y) is 10. Therefore, all we have to do is substitute with y in the above equation and solve for the time t as follows:
y = -16t² + 120
10 = -16t² + 120
120 - 10 = 16t² 
110 = 16t²
t² = 110/16
t² = 6.875
either t = 2.74 seconds ..........> accepted
or t = -2.74 seconds .........> rejected as time cannot be in negative

Hope this helps :)
5 0
3 years ago
A can of orange juice has a circular base with an area of 156 square centimeters. The height of the can is 20 centimeters.
docker41 [41]
A Because if you do 156 x 20 it equals 3120. It’s A because the volume formula is Length x Width x height, And 156 and 20 were the only numbers given.
4 0
4 years ago
May I know the answer of number 1 pls quick
tino4ka555 [31]

n=9 would be your answer. Hope I helped

5 0
3 years ago
Read 2 more answers
5/9 (f – 32) when f = 50
kondor19780726 [428]
10

Hope it’s right best luck with your studying
7 0
3 years ago
Read 2 more answers
Other questions:
  • Johnny has $12 less than Sarah. Sarah has $35 less than Carla. In total, they have $143. How much money does each of them have?
    10·1 answer
  • Samples of size n= 240 are randomly selected from the population of numbers (O through 20)
    10·1 answer
  • Find the measure of the supplement of a 158 angle
    6·1 answer
  • How are these numbers different 1.5 and 15
    6·2 answers
  • Indicate the equation of the line, in standard form, that passes through (2, -4) and has a slope of 3/5. Enter your answer into
    14·1 answer
  • What is each number in scientific notation 0.0000855 855,000
    11·1 answer
  • Write the equation of the line in point-slope form that passes through the point (-2.3)
    7·1 answer
  • If there are 5 innches of snow in 8 hour how many inches of snow in one hour
    8·1 answer
  • Stacia walked a total of 30,375 feet. If 2 miles is 10,560 feet, how far did Stacia walk in miles?
    10·2 answers
  • Whats 9+10= help will give brainlist
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!