answer.
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
inessss [21]
1 year ago
7

Sin8x=8sinxcosxcos2xcos4x proving trig identity?

Mathematics
1 answer:
weeeeeb [17]1 year ago
7 0
sin 8 x = 2 sin 4x  cos 4x =
= 2 * 2  sin 2x  cos 2x  cos 4 x =
= 4 * 2  sin x  cos x  cos 2x  cos 4x =
= 8  sin x  cos x  cos 2x  cos 4x    ( correct )  
You might be interested in
A coordinate plane with a line passing through (negative 4, 3), (0, 1), and (4, negative 1). Which linear function is represente
9966 [12]

Answer:

Step-by-step explanation:

If these 3 points are collinear, then we can find the slope of the linear function using any 2 of those points.  Suppose we use (-4, 3) and (0, 1):  

As we move from (-4, 3) to (0, 1), x increases by 4 and y decreases by 2.  Hence, the slope of this lilne is m  = rise/run = -2/4, or m = -1/2.

Using the slope-intercept formula y = mx + b and replacing y with 1, x with 0 and m with -1/2, we get:

1 = (-1/2)(0) + b, or b = 1.  Then the desired equation is y = f(x) = (-1/2)x + 1

8 0
1 year ago
Read 2 more answers
Given the image below, what is the image of C after a dilation with a scale factor of 3
Ne4ueva [31]

Answer: The coordinates of point C after the dilation are (-2, 5)

Step-by-step explanation:

I guess that you want to find where the point C ends after the dilation.

Ok, if we have a point (x, y) and we do a dilation with a scale A around the point (a,b), then the dilated point will be:

(a + A*(x - a), b + A*(y - b))

In this case we have:

(a,b) = (2,1) and A = 3.

And the coordinates of point C, before being dilated, are: (1, 2)

Then the new location of the point C will be:

C' = (1 + 3*(1 - 2), 2 + 3*(2 - 1)) = (1 -3, 2 + 3) = (-2, 5)

6 0
1 year ago
The distributive property can be applied to which expression to factor 12x3 – 9x2 4x – 3?
fomenos
3x2(4x<span> – 3) + 1(4</span>x<span> – 3) </span>
3 0
1 year ago
Read 2 more answers
The area of a second soup can’s base is 5 pi inches squared. The can has a height of 10 inches. How would you use that informati
Ilia_Sergeevich [38]

Answer:

The amount of soup the can will hold is;

50π inches cubed = 157.08 inches cubed

Step-by-step explanation:

The amount of soup the can will hold is equal to the volume of the can.

Volume of the can = base area × height

Given;

Base Area = 5π inches squared

height = 10 inches

Volume of can = 5π × 10 = 50π inches cubed

The amount of soup the can will hold is;

50π inches cubed = 157.08 inches cubed

8 0
1 year ago
Read 2 more answers
Amala listed her assets and liabilities. Credit Card Balance Car (Paid in full) Jewelry Student Loan Savings Account Stocks $850
MakcuM [25]

Answer:

 Total of Amala’s liabilities is $5500 .

Step-by-step explanation:

Liabilities is defined as  the sums of money which it owes .

As given

Amala listed her assets and liabilities. Credit Card Balance Car (Paid in full) Jewelry Student Loan Savings Account Stocks $850 $2,200 $125 $2,500 $1,200 $1,500 .

As Credit card balance , car (Paid in full) and student loan are Amala liabilities .

Thus

Total amount of Amala’s liabilities = Credit card balance  + car + student loan .

Putting all the values in the above

Total amount of Amala’s liabilities = 850  + 2200 + 2500

                                                         = $5500

Therefore the  total of Amala’s liabilities is $5500 .


4 0
2 years ago
Read 2 more answers
Other questions:
  • Louis wants to carpet the rectangular floor of his basement the basement has an area of 864 square feet the width of the basemen
    9·1 answer
  • What is the constant of proportionality in the equation y = 2.5x?
    13·2 answers
  • A new computer has a model number, a part number, and a serial number. The model number is assigned by the manufacturer to ident
    13·2 answers
  • gia got some books from the library yesterday. she got five books after returning three. Gia now has six books. how many library
    13·2 answers
  • Three friends went to the fair. Michelle ate three hot dogs, one pretzel, and two snow cones. She spent $25. Amanda ate two hot
    13·2 answers
  • A hot air balloon is floating above a straight road. To estimate their height above the ground, the balloonists simultaneously m
    10·1 answer
  • Eric has two dogs. He feeds each dog 250 grams of dry food each, twice a day. If he buys a 10-kilogram bag of dry food, how many
    14·2 answers
  • Is the right arm or left arm stronger? Twenty five right handed people were studied. They were asked to do as many bicep curls a
    12·1 answer
  • Anika buys a pair of shin guards for $8.58 and several pairs of soccer socks for $4.29 per pair. If she spends $25.74 before tax
    14·1 answer
  • What kinds of quadrilateral is the shape shown ?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!