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
ELEN [110]
2 years ago
9

Complete the identity. cos (alpha - beta)/cos alpha cos beta = ?

Mathematics
2 answers:
Zepler [3.9K]2 years ago
5 0
\frac{cos(a-b)}{cos(a)cos(b)} =  \frac{cos(a)cos(b)+sin(a)sin(b)}{cos(a)cos(b)} = 1+ \frac{sin(a)sin(b)}{cos(a)cos(b)} =1+tan(a)tan(b)

Note that I used these identities :cos(a-b)=cos(a)cos(b)+sin(a)sin(b) and  tan(a)= \frac{sin(a)}{cos(a)}
MrRa [10]2 years ago
3 0
I belive the answer to be b
You might be interested in
What is the theoretical probability of the event that a family with two children has one boy and one girl? Make a tree diagram t
djyliett [7]
I can't make a tree diagram via computer but when I get home I can get to my phone and send you a pic of one but their's a total of 4 outcomes that's just one of the possibilities out of those 4 so it would be A) YW :D
4 0
3 years ago
Read 2 more answers
Which of the following is an example of a subset? The number of IT employees out of all employees working in an office of Google
marta [7]

Answer:

The number of IT employees out of all employees working in an office of Google

Step-by-step explanation:

The answer is the first one, because the rest Just describes a group of People, a subset is a part of a larger group of related things, while the others describes just a group of people, the first one which is the answer describes a group of people that's part of a larger group of people,

The subset is the IT employees working in an office for Google

whIle the main set is All employees working in an office of Google

4 0
2 years ago
Teni had 16 berries. She has a number two greater than Marta. How many berries Marta had
Hitman42 [59]
I think the answer is 8
but im not 100% sure
5 0
3 years ago
Read 2 more answers
6. j + 1,239 = 1,300 (1 point) Oj=61 Oj=71 Oj = 59​
SSSSS [86.1K]
The answer would be j=61 in order to make the equation true
5 0
3 years ago
0.7x+6=0.3(4x+6)−2x
Gelneren [198K]

Answer: x=-2.8

Step-by-step explanation:

Given the following equation:

0.7x+6=0.3(4x+6)-2x

You can follow these steps in order to solve for "x" and find its value:

1. Apply Distributive property on the right side of the equation:

0.7x+6=0.3(4x+6)-2x\\\\0.7x+6=1.2x+1.8-2x

2. Subract 0.7x from both sides and add the like terms:

0.7x+6-(0.7x)=1.2x+1.8-2x-(0.7x)\\\\6=-1.5x+1.8

3. Subtract 1.8 from both sides:

6-(1.8)=-1.5x+1.8-(1.8)\\\\4.2=-1.5x

4. Finally, divide both side of the equation by -1.5:

\frac{4.2}{-1.5}=\frac{-1.5x}{-1.5}\\\\x=-2.8

8 0
3 years ago
Read 2 more answers
Other questions:
  • Alan is 5 years older than Bob. Bob is twice as old as Cindy. All their ages add up to 20. What are their ages?
    8·1 answer
  • One number is 3 more than another. The difference between their square is 63. What are the numbers?
    15·1 answer
  • The measure of an obtuse angle is greater than 0 and less than 90 degrees 90 degrees greater than 90 and less than 180 degrees
    9·2 answers
  • 3 names for a square
    12·2 answers
  • A line passes through the points ( 3,0) and (4,1). What is the y-intercept of the line?
    15·2 answers
  • Please answer this question only if you know it!! 25 points and brainliest!!
    8·2 answers
  • URGENT!!!
    14·2 answers
  • you need to slack four bucks for a list of nine to read for your research project. How many ways can you choose for books to rea
    8·1 answer
  • Timed math quiz 12 <br> Please help me
    6·1 answer
  • Use the​ add-on method for determining interest on a loan of ​$​,2540 with an annual rate of 6​% and a term of 4 years.​ Then, d
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!