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
scZoUnD [109]
3 years ago
12

The expression cos(A-B) - cos(A+B) is equal to

Mathematics
2 answers:
olchik [2.2K]3 years ago
6 0
Cos (A-B) - cos (A+B) 
= (cosAcosB +sinAsinB) - (cosAcosB - sinAsinB)
=2sinAsinB

Ans: 4
tigry1 [53]3 years ago
4 0
Cos (A+B)=cos (A) cos( B)-sin (A) sin (B)
cos (A-B)=cos (A) cos (B)+sin (A)sin (B)

Then:
cos (A-B)-cos (A+B)=
[cos (A) cos (B)+sin (A)sin (B)]-[cos (A) cos( B)-sin (A) sin (B)]=
cos (A) cos( B)+sin (A) sin (B)-cos (A) cos( B)+sin (A) sin (B)=
sin (A)sin (B)+Sin (A)sin(B)=
2sin (A)sin (B)

Answer: 4) 2sin (A)sin (B)


You might be interested in
How do i solve 1/4 (x+3)-4x<3 (1+x) ... its suppose to be a greater than or equal to sign
sdas [7]
First, multiply 1/4 by x+3 ⇒(1/4x+3/4). Next, multiply 3 by 1+x ⇒(3+3x). The equation should now look like this: 1/4x+3/4-4x≤3+3x. The next thing you have to do is get all of the x's on one side of the symbol. Subtract 1/4x from both sides, and the equation then looks like this: 3/4-4x≤3+2 3/4x. Add the -4x to both sides, and the equation should look like this: 3/4≤3+6 3/4x. Next, you have to move the 3 to the left side. To do that, subtract it from both sides. The equation then look like this: -2 1/4≤6 3/4x. Then, to get the x alone, you need to divide the coefficient (6 3/4) by -2 1/4, which equals -1/3 or -0.3 repeating. So, -1/3≤x
7 0
4 years ago
Read 2 more answers
A recipe for 1 gallon of fruit punch calls for 3/4 of orange juice.how many cups of orange juice are needed to make 8 gallons of
monitta

Answer:

6

Step-by-step explanation:

3/4 = 0.75

0.75 * 8 = 6

4 0
3 years ago
Read 2 more answers
What sort of information can you get from conditional frequencies that you couldn't get by just looking at the relative frequenc
shepuryov [24]

Answer:

<h2>Conditional frequencies offer more specific information to analyse certain data set.</h2>

Step-by-step explanation:

A conditional frequency is a type of relative frequency which involves a condition to be defined.

For example, the conditional frequency of having a house given that the person is female. Notice that this example shows the condition "being female", so the conditional frequency would be all females who own a house.

On the other hand, the relative frequency is just a ratio between the frequency of the data and the total number of  data. It's doesn't includes a condition to be defined, that's the difference.

Therefore, conditional frequencies offer more specific information to analyse certain data set.

3 0
3 years ago
Is this relationship linear, exponential, or neither?
marysya [2.9K]

Answer:

It is exponential.

Step-by-step explanation:

The x-values in the table are increasing by 9 and the y-values are multiplying by 2 each time. If the y value is increasing by addition, it will be linear, and if it increasing by multiplication it will be exponential.

Using a graphing website like desmos, or a graphing calculator, you can input these values to check if it is correct.

3 0
4 years ago
Please help!!!!!!!!!!!!!!!!!!
vlabodo [156]

Answer:

57°

Step-by-step explanation:

The sum of both angles is 90°

3x+5x+2=90

8x+2=90

8x=88

x=11

Plug x into the equation

Larger Angle

5(11)+2=57

Smaller Angle

3(11)=33

4 0
3 years ago
Read 2 more answers
Other questions:
  • Given a mean of 8 and a standard deviation of 0.7, within how many standard deviations of the mean do the values 7.7, 8.4, 9, 8,
    12·1 answer
  • Jet has 9 bins of kitten supplies to give away to animal hospitals. Each bin has 40 bags of supplies. There are 8 animal hospita
    9·1 answer
  • What times 2 is equal to 20?
    5·2 answers
  • What's the volume of the sphere? 14ft is the diameter.
    6·1 answer
  • Phil can run 5½ mph<br>how far can he run in ⅓ of an hour?​
    14·1 answer
  • WILL MARK BRAINLIEST!!!!!
    14·1 answer
  • The teacher shows his students the equation 3x - 5y = 18, then asks them to choose the equation that would
    10·1 answer
  • Solve the equation for y.<br><br> 6y+x=8
    6·1 answer
  • 14 is added to ⅔ of a number. The result is 1¼ times the original number find the number​
    10·2 answers
  • Question 10 of 20
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!