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
Elodia [21]
2 years ago
10

CosA×cos2A+sinA×sin2A=cos (2A-A)​

Mathematics
1 answer:
Aleksandr-060686 [28]2 years ago
7 0

Answer:

csc

A

, as desired!

Step-by-step explanation:

cos

2

A

sin

A

+

sin

2

A

cos

A

,

=

cos

2

A

cos

A

+

sin

2

A

sin

A

sin

A

cos

A

,

=

cos

(

2

A

−

A

)

sin

A

cos

A

,

=

cos

A

sin

A

cos

A

,

=

1

sin

A

,

=

csc

A

, as desired!

You might be interested in
132 stickers and 25 students. How many stickers left over
laila [671]
I got pretty much 5 stickers for each student. does it give you answers or do you have to fill in the answer?
5 0
3 years ago
Read 2 more answers
Solve the system of equations 2x - y = 11 and x + 3y = -5
Anna11 [10]

Answer:

x = 4, y = -3

Step-by-step explanation:

{2x - y = 11

{x + 3y = -5

You can use the substitution method by solving for x in the second equation:

x + 3y = -5

Subtract 3y from both sides:

x = -3y - 5

Now, substitute this value for x into the first equation:

2x - y = 11

2(-3y - 5) - y = 11

Distribute:

-6y - 10 - y = 11

Add 10 to both sides:

-6y - y = 21

Combine like terms:

-7y = 21

Divide both sides by -7:

<u>y = -3</u>

Next, substitute this value for x into the second equation:

x + 3y = -5

x + 3(-3) = -5

Multiply:

x - 9 = -5

Add 9 to both sides:

<u>x = 4</u>

3 0
3 years ago
Read 2 more answers
Find the area of the region between two concentric circular paths. If the radii of the circular paths are 210 m. and 490 m. resp
taurus [48]

Given :

  • The radii of the circular paths are 210 m. and 490 m.

To Find :

  • The area of the region between two concentric circular paths.

Solution :

Area of the outer circle :

\: \qquad  \dashrightarrow \sf{{ \pi \: \times  {(490)}^{2}  {m}^{2}}}

\: \qquad  \dashrightarrow \sf{{ \ \dfrac{22}{7} \times   \:490 \times 490 \:  {m}^{2}}}

\: \qquad  \dashrightarrow \sf{{ \ \dfrac{22}{ \cancel{7}} \times   \cancel{490} \times 490 \:  {m}^{2}}}

\: \qquad  \dashrightarrow \sf{{ \ {22} \times   70 \times 490 \:  {m}^{2}}}

\: \qquad  \dashrightarrow \bf{{ \ 754600 \:  {m}^{2}}}

⠀

Area of the inner circle :

\: \qquad  \dashrightarrow \sf{{ \pi \: \times  {(210)}^{2}  {m}^{2}}}

\: \qquad  \dashrightarrow \sf{{ \ \dfrac{22}{7} \times   \:210 \times 210 \:  {m}^{2}}}

\: \qquad  \dashrightarrow \sf{{ \ \dfrac{22}{ \cancel{7}} \times   \cancel{210} \times 210 \:  {m}^{2}}}

\: \qquad  \dashrightarrow \sf{{ \ {22} \times   30 \times 210 \:  {m}^{2}}}

\: \qquad  \dashrightarrow \bf{{ \ 138600 \:  {m}^{2}}}

⠀

Therefore,

Area of the region inside the circular paths :

\: \qquad  \dashrightarrow \sf{{ \ (754600 - 138600  )  \: {m}^{2}}}

\: \qquad  \dashrightarrow \bf{{ \ 616000 \:  {m}^{2}}}

6 0
2 years ago
If 3/5 = 24/a then what does a=?
Lelu [443]
24/3 = 8

5 x 8 = a

5 x 8 = 40

a = 40

hope this helps
8 0
3 years ago
Read 2 more answers
What is the slope of the line?
Art [367]

Answer: B. 1/5

Step-by-step explanation:

4 0
2 years ago
Other questions:
  • D. 20.0<br> Math question no Guessing and Please show work
    8·1 answer
  • I NEED HELP ASAP!!!]
    7·1 answer
  • -10x +y = -52 x-value and y-intercept​
    11·1 answer
  • 2. The sum of the measures of angle X and angle Yis 90. If the measure of angle Xis 30 less than twice the
    12·1 answer
  • a quadrilateral ABCD in which angle DAB is a right angle. AB is 3.3cm, BC is 3.9cm, CD is 5.2cm and DA is 5.6cm. Find the length
    9·1 answer
  • Select the angle pairs that will make these triangles similar by AA~ (Please explain) I will mark brianliest!!!
    13·1 answer
  • A ball rebounds 70% of its original height. It is dropped from an initial height of 400 cm.
    6·1 answer
  • The coordinates of the vertices of a quadrilateral are (8, 11) (11, 7) (8, 3) (2, 3). What is the area, in square units, of the
    14·1 answer
  • Help pls fast
    13·1 answer
  • Determine whether the following pairs of line will be parallel perpendicular or neither x=y ;x=y+1​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!