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
Anestetic [448]
3 years ago
13

Verify the identity. tan x plus pi divided by two = -cot x

Mathematics
1 answer:
Misha Larkins [42]3 years ago
4 0
The provided equation is not an identity
You might be interested in
The city of Madison regularly checks the quality of water at swimming beaches located on area lakes. Fifteen times the concentra
Maksim231197 [3]

Answer:

The sample standard deviation is 393.99

Step-by-step explanation:

The standard deviation of a sample can be calculated using the following formula:

s=\sqrt[ ]{\frac{1}{N-1} \sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} }

Where:

s= Sample standart deviation

N= Number of observations in the sample

{\displaystyle \textstyle {\bar {x}}}= Mean value of the sample

and \sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} } simbolizes the addition of the square of the difference between each observation and the mean value of the sample.

Let's start calculating the mean value:

\bar {x}=\frac{1}{N}  \sum_{i=1}^{N}x_{i}

\bar {x}=\frac{1}{15}*(180+1600+90+140+50+260+400+90+380+110+10+60+20+340+80)

\bar {x}=\frac{1}{15}*(3810)

\bar {x}=254

Now, let's calculate the summation:

\sum_{i=1}^{N}(x_{i}-\bar {x}) ^{2} }=(180-254)^2+(1600-254)^2+(90-254)^2+...+(80-254)^2

\sum_{i=1}^{N}(x_{i}-\bar {x}) ^{2} }=2173160

So, now we can calculate the standart deviation:

s=\sqrt[ ]{\frac{1}{N-1} \sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} }

s=\sqrt[ ]{\frac{1}{15-1}*(2173160)}

s=\sqrt[ ]{\frac{2173160}{14}}

s=393.99

The sample standard deviation is 393.99

3 0
3 years ago
If petty get four cookies and gave 3away how many do petty have
Zielflug [23.3K]
One cookie because 4 - 3 = 1
6 0
3 years ago
Read 2 more answers
Question 5 (1 point)
RoseWind [281]

Answer:c

Step-by-step explanation:

7 0
2 years ago
Find the inverse of f(x)=x/4-7
kirill [66]

Answer:

fx^{-1} (x)=4x+28

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is the value of k when the expression 3(7 + x) is equivalent 3(x + k)
Free_Kalibri [48]

Answer:7

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • The floor of the gazebo shown is a regular octagon. Each side of the floor is 8 feet, and the area is about 309 square feet. You
    15·1 answer
  • A) three numbers sum to 15. The mode of the three numbers is 1. What must the three number be?
    5·1 answer
  • What are the factors of 66
    6·1 answer
  • What is the Least Common Multiple of 12 and 9
    14·1 answer
  • Billy must decide whether he will stay home or go to a friend’s house. If he stays home, he can watch tv or play ps4. If he goes
    15·1 answer
  • Intercepts from a graph
    5·1 answer
  • Cannn. Somebodddy answerrr them all, pleaseee
    8·1 answer
  • In ΔVWX, the measure of ∠X=90°, XW = 12, WV = 13, and VX = 5. What ratio represents the tangent of ∠V?
    11·2 answers
  • Context/Question: Rachel bought a framed piece of artwork as a souvenir from her trip to Disney World. The diagonal of the frame
    8·1 answer
  • Marjorie needs to cut 5 yards of fabric into sections that are 7 of a yard long. How many sections will she be able to cut from
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!