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
Igoryamba
3 years ago
11

__cos b = 1/2 [cos (a+b) + cos (a-b)] A. sin(a) B. sin(b) C. cos(a) D. cos(b)

Mathematics
2 answers:
Annette [7]3 years ago
5 0

Answer:

C is correct

COS (A) is right

Step-by-step explanation:

Helen [10]3 years ago
4 0

Answer:

cos(a)

Step-by-step explanation:

I substituted it on a calculator:

a = 30

b = 45

1/2 [ cos (a + b) + cos (a - b)]

1/2 [ cos (30 + 45) + cos (30 - 45)] = Sqrt6/4

cos(a)cos(b)

cos(30)cos(45) = Sqrt6/4

You might be interested in
I need some heckin help cuz i suck at math :)
vladimir1956 [14]

Answer:

Step-by-step explanation:

Reasons

2. If two lines are parallel, their corresponding angles are congruent.

3. Congruent angles are equal... Why do they even have this step?

4. A straight line forms a linear pair.

5. Angles in a linear pair are supplementary.

6. ∠1 is supplementary to ∠3. Reason: If an angle is congruent to an angle that is supplementary to a third angle, the first and third angles are congruent OR Transitive Property.

7 0
3 years ago
What is the y-intercept of 2g(x)+3x=6?
umka21 [38]

The y-intercept is basically the value of the output of the function, g(x), when x=0.

Let's replace g(x) with the variable y to make this look a bit simpler.

2y + 3x = 6

Now, we enter the value of x=0 to get the y-intercept.

2y + 0 = 6

2y = 6

Divide both sides by 2

y = 3

The value of y is 3. Now enter the values of x=0 and y=3 into point-form (x,y) to get (0,3). You should know which answer choice to choose now.

Have an awesome day!

8 0
3 years ago
• One Class is selling tickets for $2.50 and has already raised $350
Jet001 [13]

C because it has the price of each ticket.

3 0
3 years ago
Read 2 more answers
?<br> Which is the simplified form of n -6p3?
prohojiy [21]

<u>OPTION C</u>

if any doubt leave a comment

6 0
2 years ago
Read 2 more answers
How to factor x^3 - 4x^2 - 9x + 36 by grouping
const2013 [10]

Answer:

(x-4) (x-3) (x+3)

Step-by-step explanation:

x^3 - 4x^2 - 9x + 36

Make 2 groups

x^3 - 4x^2            - 9x + 36

We can factor out x^2 from the first group and -9 from the second group

x^2 (x-4)    - 9(x-4)

Now factor out (x-4)

(x-4) (x^2 -9)

This may be an answer choice but we can still factor

(x^2 -9) is the difference of squares

(x^2-9) = (x-3) (x+3)

Replacing this

(x-4) (x-3) (x+3)

6 0
3 years ago
Read 2 more answers
Other questions:
  • Help please need it by 9/12/18 at 7:40 am please please please
    7·2 answers
  • Mn- p=2m<br> (solve for m)
    13·2 answers
  • Find the distance between the points A (13, 2) and B (7, 10).
    8·1 answer
  • Compare -3 and 9. Which of the following is true?
    5·1 answer
  • Select the correct comparison.
    8·2 answers
  • Two roller coasters are vying for the title of the steepest drop the first ride has a hill that drops 140 feet in a 40 foot run
    11·1 answer
  • Robbie owns 15 % more movies than Rebecca, and rebeca owns 10% more movies than Joshua. If Rebecca owns 220 movies, how many mov
    6·1 answer
  • 1.- Maria compro $750 en mercancia, por pajar en efectivo le hacen un descuento del 15%, ¿cuánto pago Maria con el descuento?
    14·1 answer
  • When you subtract 8from 10 what is the different​
    15·1 answer
  • A car can go 420 miles on a tank of gas (15 gallons in a tank). How many kilometers can this car go on 6.5 gallons
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!