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
KiRa [710]
3 years ago
5

Which expression best represents all solutions of x for the equation cot x = –1.25, where k is any integer?

Mathematics
1 answer:
Alika [10]3 years ago
5 0

Answer:

The answer is "-0.675+ k \ \pi"

Step-by-step explanation:

Given:

\to \cot \ x = - 1.25\\\\\to \cot \ x =  \cot (-0.675)\\\\\to x=  k \pi + (-0.675)\\\\\boxed{\boxed{\boxed{x=  -0.675 + k \pi}}}

You might be interested in
if a pyramid and a rectangular prism have congruent bases and equal heights, what's the difference between their volumes?
Marysya12 [62]
What are answer for can you put the answers please
3 0
3 years ago
A researcher wishes to​ estimate, with 99​% ​confidence, the population proportion of adults who think the president of their co
scoray [572]

Answer:

a. n=4148

b. n=3909

c. The sample size is smaller if a known proportion from prior study is used. The difference in sample sizes is 239

Step-by-step explanation:

a. For sample where no preliminary estimate is given, the minimum sample size is calculated using the formula:

n=p(1-p)(\frac{z}{ME})^2

Where:

  • ME=Margin of error
  • p= is the assumed proportion

#Let p=0.5, substitute in the formula to solve for n:

n=0.5(1-0.5)\times (2.576/0.02)^2\\\\=4147.36\approx 4148

Hence, the minimum sample size is 4148

b. If given a preliminary estimate p=0.38, we use the same formula but substitute p with the given value:

n=p(1-p)(z/ME)^2\\\\=0.38(1-0.38)(2.576/0.02)^2\\\\=3908.47\approx3909

Hence, the minimum sample size is 3909

c. Comparing the sample sizes from a and b:

n_{0.5}>n_{0.38}\\\\n_{0.5}-n_{0.38}=4148-3909=239

Hence, the actual sample size is smaller for a known proportion from prior a prior study.

8 0
3 years ago
Please help i dont understand at all :(
andrey2020 [161]
180 - 46 - 24 = 110

d+ 80 = 110
d = 30

answer
d = 30
3 0
3 years ago
**WARNING** IF YOU ANSWER THIS QUESTION INCORRECTLY OR TRY TO ANSWER WITH FOOLISHNESS YOU WILL GET REPORTED
frozen [14]

The solution is attached as a word file.

Download doc
3 0
3 years ago
−13 − (−27) <br> pls help-
sergij07 [2.7K]

Answer:14

Step-by-step explanation: minus *minus = + so its +27

and then you just do the maths 27-13=14

3 0
3 years ago
Other questions:
  • Item: Circle D has a radius of 16 inches and right central angle, _EDF. Find the exact length of EF.
    5·1 answer
  • Square Root Of 0.36 is<br> 1. 0.6<br> 2. 0.06<br> 4. 1.8<br> 5. 0.18<br><br> please Help me
    5·2 answers
  • art bought 4 boxes of pens but gave his friend ben 8 pens and now has a total of 112 pens how many are in a box? which of the fo
    10·2 answers
  • In the diagram, WX, XY and YZ are three sides of a regular polygon A.
    6·1 answer
  • Simplify the expression, Please help!!
    15·1 answer
  • Help ASAP.. PLZ
    7·1 answer
  • PLEASE PLEASE HELP ME
    5·1 answer
  • PLEASE HELP ILL MARK BRAINLIEST
    11·2 answers
  • A bike was originally $102 and is on sale for 30% off. what is the discounted priice
    10·2 answers
  • Find the quotient of <img src="https://tex.z-dn.net/?f=%5Cfrac%7B%28x%5E%7B3%7D%20-%202x%5E%7B2%7D%20%2B%206x%20%2B%203%29%7D%7B
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!