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
Lady_Fox [76]
3 years ago
15

Prove that: sin8A/1-cos8A=cot4A​

Mathematics
1 answer:
nikitadnepr [17]3 years ago
8 0

Step-by-step explanation:

Recall the identity

\tan \frac{A}{2}= \dfrac{1 - \cos A}{\sin A}

We can see that

\dfrac{\sin 8A}{1 - \cos 8A} = \dfrac{1}{\tan 4A}= \cot 4A

You might be interested in
What is another way to write 7/8x+3/4=-6
Bess [88]

Answer:

7x + 6 =  - 48

Step-by-step explanation:

The given expresion is

\frac{7}{8}x +  \frac{3}{4}  =  - 6

We multiply through by 8 to get:

8 \times \frac{7}{8}x +  8 \times \frac{3}{4}  =  - 6 \times 8

We cancel out to obtain:

7x +  2 \times 3 =  - 6 \times 8

We simplify to obtain:

7x +  6 =  - 48

5 0
2 years ago
Please help explanation if possible
Zielflug [23.3K]

Answer:

length = 48 feet , width = 32 feet

Step-by-step explanation:

Using

2W + 2L = 160 with W = L - 16 , then

2(L - 16) + 2L = 160 ← distribute and simplify left side

2L - 32 + 2L = 160

4L - 32 = 160 ( add 32 to both sides )

4L = 192 ( divide both sides by 4 )

L = 48

Substitute L = 48 into W = L - 16

W = 48 - 16 = 32

Thus length = 48 feet and width = 32 feet

3 0
2 years ago
Read 2 more answers
At a hardware store, each wooden plank costs $3.57. How much do 12 planks cost?
777dan777 [17]
To find this answer, we need to multiply 3.57 by 12.
3.57 * 12 = 42.84
Therefore, 12 planks will cost $42.84.
5 0
3 years ago
Read 2 more answers
Will give brainliest please help
Triss [41]

Answer:

35C12 = 834451800

Step-by-step explanation:

.............

8 0
3 years ago
You call the pizza store and find out that each pizza has 12 slices. You expect 16 people to come and you estimate eacher person
djverab [1.8K]

You should order 4.

(16×3)÷12

48÷12

4


6 0
3 years ago
Read 2 more answers
Other questions:
  • What is the value of x?<br><br> /60"<br> 95<br> O A. 1550<br> O B. 350<br> O C. 25°<br> O D. 600
    5·1 answer
  • WILL GIVE A BRAINLIEST TO THE CORRECT ANSWER PLEASE HELP!!
    7·1 answer
  • 8(-6a+2)+(-5)(-9a+2)
    15·2 answers
  • The variables x and y vary directly. Use the values to find the constant of proportionality. Then write an equation that relates
    9·1 answer
  • Percent of change 200 to 300
    15·1 answer
  • 14) What is the area of the polygon?
    15·1 answer
  • Please help!
    15·1 answer
  • Which of the following is most likely the next step in the series?<br> A.<br> B.<br> C.<br> D.
    9·1 answer
  • Como se faz o cálculo 13÷5,2
    9·2 answers
  • Does y=0.5x-2 represent a proportional relationship?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!