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
laila [671]
3 years ago
7

Please help me!! 100 points!! A student solved the equation sin2x/cosx =2 ‘ 0=< x =< pi and found an answer of pi/2 descri

be the students error in 2-3 sentences
Mathematics
1 answer:
muminat3 years ago
3 0

Answer:

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

sin x = 1

x = pi/2

but cos pi/2 = 0

so the given equation is indeterminate for x = pi/2

Step-by-step explanation:

You might be interested in
What is the area, in square centimeters, of the trapezoid below?<br> 8.5 cm<br> 7.5 cm<br> 15.7 cm
Contact [7]

Answer:

90.75 cm^2

Step-by-step explanation:

The area of a trapezoid is given by

A = 1/2 ( b1+b2) *h

where b1 and b2 are the lengths of the bases and h is the height

A = 1/2(8.5+ 15.7) * 7.5

1/2 (24.2) 7.5

90.75 cm^2

6 0
2 years ago
A social studies teacher orders several large maps for his classroom. The maps are to be shipped in a cylindrical
makvit [3.9K]
A.) 36 inches is the right answer
7 0
3 years ago
Kevin took his car to Dwain's Automotive to have the engine replaced. Kevin was
tamaranim1 [39]

Answer:

Step-by-step explanation:

$2400 in labor

4 0
3 years ago
A company produces and sells widgets and gizmos. In January the company sold 350 items for a total of $9,000. If each widget sol
iren [92.7K]

Answer:

The company sold 100 widgets and 250 gizmos.

Step-by-step explanation:

Let x_1 be the number of widgets sold and x_2 be the number of gizmos sold.

We are told that the company sold 350 items. We can represent this information in an equation as:

x_1+x_2=350...(1)

We have been given that a each widget sold for $35 and each gizmo sold for $22. The company sold 350 items for a total of $9,000.

We can represent this information in an equation as:

35x_1+22x_2=9,000...(2)

From equation (1), we will get:

x_2=350-x_1

Substitute this value in equation (2):

35x_1+22(350-x_1)=9,000

35x_1+7,700-22x_1=9,000

13x_1+7,700=9,000

13x_1+7,700-7,700=9,000-7,700

13x_1=1,300

\frac{13x_1}{13}=\frac{1,300}{13}

x_1=100

Therefore, the company sold 100 widgets.

Substitute x_1=100 in equation (1):

100+x_2=350

100-100+x_2=350-100

x_2=250

Therefore, the company sold 250 gizmos.

3 0
3 years ago
Read 2 more answers
Use 3.14 for the value of , and round your answers to two decimal places, where applicable. If the diameter of a circle is 15 m,
sergejj [24]

if the diameter of a circle is 15, its radius is half that or 7.5.

\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=7.5 \end{cases} A=\pi (7.5)^2\implies A=56.25\pi \implies \stackrel{\pi =3.14}{A=176.625}

7 0
3 years ago
Other questions:
  • Which is the larger value:<br> 7 . 102<br> 2 . 107
    8·1 answer
  • What's a quantity represented by a 3x - 4 is subtracted for the quantity 5x - 7 what is the result
    12·1 answer
  • Ms. Durham makes delicious chili. Each batch makes about 900 in^3 of chili. Will a crockpot that is 15 inches high and a diamete
    7·1 answer
  • CAN YOU HELP ME WITH THIS​
    10·2 answers
  • Given the following formula, solve for y. W = x-y/2 - z
    12·1 answer
  • One question please help!
    9·2 answers
  • V+5+9v-9 what’s the answer
    5·2 answers
  • A swimmer covers 180m in 20 seconds. How many metres does she swim in one second?​
    11·1 answer
  • −3(x + 3) = −3(x + 1) − 5.
    7·1 answer
  • For questions 2 z 3. simplify each polynomial <br>2. 3x²+6-2x+5x-4x²+9<br>3. 2x²+6x-7x+8-3x²+1​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!