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
USPshnik [31]
3 years ago
14

Verify the identity. cos (x - y) - cos (x + y) = 2 sin x sin y

Mathematics
1 answer:
ra1l [238]3 years ago
8 0
It is already in identity.
cos (x - y) - cos (x + y) = 2 sin(x) sin (y)
You might be interested in
Can someone explain to me in words how to do this problem 3x+122=22x-11
inn [45]

When you have this type of problem, you need to combine the like-terms and isolate the variable.

3x + 122 = 22x - 11

Add 11 to both sides to get rid of it

3x + 122 + 11 = 22x - 11 + 11     (-11 + 11=0)

3x + 133 = 22x

Then you would bring the 3x to the other side, so subtract 3x from both sides

3x + 133 = 22x

-3x             -3x

133 = 22x - 3x

133 = 19x

Then divide both sides by 19 to isolate x

133/19 = 19x/19

133/19 = 7, so x = 7

Hope this helps!!

8 0
3 years ago
Simplify the expression a+2c-5b-c+a-b
romanna [79]
A + 2c - 5b - c + a - b
We're gonna have to combine like terms.

(a+a)+(-5b-b)+(2c-c)

2a-6b+c This is your answer
6 0
3 years ago
Please please help me
Anarel [89]

so you are going to use the Pythagorean theorem on the smaller triangle to find the connecting side's length

{5}^{2}  = {3}^{2} ( {b}^{2} ) \\ b = 4

now you can find the bigger triangle's hypotenuse

{6}^{2}  +  {4}^{2}  =  {c}^{2}  \\

c=4

8 0
3 years ago
Choose 2 answers one for the center and one for the spread
Citrus2011 [14]
Is A & C.

Explanation:
A. Median for sea turtles:
The set is odd, so median is the middle number - 4
The koi set had 10, even number, so the median for the koi is the average of the 2 middle: 4+3=3.5

Turtles > koi

C. The ages of koi are more spread out - 10. The turtles are only 5.




7 0
3 years ago
What is the equation of the line that is perpendicular to the graph of x=48-4y
8090 [49]

Answer:

find y intercept: x= 0 => y = 12

y = -x + 12 (1)

y = x + 12 (2) is answer

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • 50 Points!
    5·1 answer
  • What is the shape’s area?
    5·1 answer
  • What's 20/30 times 24/30?
    14·1 answer
  • 8/10 divided by 1 5/6
    8·2 answers
  • What is 92 divided by 2?
    6·1 answer
  • in a town, 11 000 people out of the total population of 50 000 are aged under 18. What percentage of the population is aged unde
    14·1 answer
  • Which could be the base shape of the cylinder
    6·2 answers
  • How do I do a ratio table?
    5·2 answers
  • Bestie tried to solve an equation step by step. 3(a+7)=-33
    10·2 answers
  • A scientist wants to know if the color of the water affects how much animals drink. The average amount of water each animal drin
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!