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
Y_Kistochka [10]
2 years ago
9

Sin(x-y)+sin(x-y prove the identity

Mathematics
1 answer:
Nikitich [7]2 years ago
7 0

Step-by-step explanation:

\sin(x - y)  +  \sin(x + y)  = 2 \sin(x)  \cos(y)

We use the sum and difference identities.

Remeber the sum difference identity is

\sin(x + y)  =  \sin(x)  \cos(y)  +  \cos( x )  \sin(y)

and

\sin(x - y)  =  \sin(x)  \cos(y)  -  \sin(x)  \cos(y)

So we get

(\sin(x)  \cos(y)  -  \sin(y)  \cos(x) ) +  \sin(x)  \cos(y)  +  \sin(y)  \cos(x)

Combine like Terms.

2 \sin(x)  \cos(y)  = 2 \sin(x)  \cos(y)

We have provided it.

You might be interested in
Help?<br><br> 3. Three times a number is two times the difference of that number and one.
erastovalidia [21]

Answer:

3x = 2(-3x + 1)

Step-by-step explanation:

I think that's it I think it could be wrong but I tried

8 0
3 years ago
Read 2 more answers
Help me please! which bisects the chord?
8_murik_8 [283]

Answer:

B. 3

Step-by-step explanation:

Since you are given that chord AB's length is 8 and is bisected by segment XC, that means segment BC's length is 4 and ∠XCB is a right angle. From there, we use Pythagorean Theorem to solve for length XC:

4² + b² = 5² (Or remember 3-4-5 makes a Pythagorean triple)

c = √(5²-4²)

c = 3

6 0
3 years ago
Cornelia cut equal lengths of ribbon each 7/10 ft long. The ribbon was 3 1/2 ft long.How many pieces did Cornelia cut?
Ilya [14]

she cut two and two thirds 2 2/3


6 0
3 years ago
Read 2 more answers
(04.05 MC)
nika2105 [10]

Answer:

D

Step-by-step explanation:

Plug in and see.

Check A: Lets plug in (0,3) into y<2/3 x+2.

3<2/3 (0)+2

3<2 is not true so not A

Check C: Lets plug in (3,5) into y<2/3 x+2.

5<2/3 (3)+2

5<2+2

5<4 is not true so not C

Check B: Lets plug in (-3,1) into y<2/3 x+2.

1<2/3 (-3)+2

1<0 is not true so not B

Check D: Lets plug in (1,2) into y<2/3 x+2.

2<2/3 (1)+2

2<2/3+2 is true so D

6 0
3 years ago
Marlene is solving a number puzzle involving three rational numbers a, b, and c. Here are her clues:
rusak2 [61]
A/c = 8.....a = 8c
a * c = 2 ...a = 2/c
a/b = -16 ...a = -16b
a * b = -1....
b/c = -0.5

2/c = 8c
2 = 8c^2
1/4 = c^2
sqrt 1/4 = c
0.5 (or 1/2) = c <===

a * c = 2
0.5a = 2
a = 2/0.5
a = 4 <===

a = -16b
4 = -16b
4/-16 = b
-1/4 (or - 0.25) = b <===
5 0
3 years ago
Other questions:
  • P(x)-x15x-48x + 450, x è 3 is an approximation to the total profit (in thousands of dollars) from the sale of x hundred thousand
    11·1 answer
  • Estimate the measure of the angle<br> formed by the hands of a clock at time 10:40
    12·1 answer
  • Use the distributive property to write an equivalent expression for 9(x+5)
    7·2 answers
  • The larger of two numbers is 11 more than twice the smaller. The sum of the is 1 less than seven times the smaller. Find the num
    11·1 answer
  • What is the area?? Please help
    6·1 answer
  • Epps help me it’s hard like me
    11·2 answers
  • A survey was conducted to find the possible relationship between age groups and the most favored of three book genres. The data
    13·1 answer
  • Lowest common factor of 72 and 108​
    12·1 answer
  • Marie is saving $75 each week so she can buy a new laptop which costs $1200. She has already saved $125. Find the minimum number
    15·1 answer
  • 2. If you are paid time and a half for Saturday and double time for Sunday,
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!