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
ludmilkaskok [199]
2 years ago
9

Prove that cos^4∆ - sin^4∆ = 2cos^2∆ - 1

Mathematics
1 answer:
GarryVolchara [31]2 years ago
3 0

\cos^{4} x-\sin^{4} x\\\\=(\cos^{2} x+\sin^{2} x)(\cos^{2} x-\sin^{2} x)\\\\=\cos^{2} x-\sin^{2} x\\\\=\cos^{2} x-(1-\cos^{2} x)\\\\=2\cos^{2} x-1

You might be interested in
Who can help me with this plzz
Brrunno [24]
.04d + 20. 

This is because even with no miles they charge 20 more and then 4 cents more for any additional mile. 
6 0
3 years ago
Convert the following<br> 64mL= cm cubed
Novosadov [1.4K]
1ml=1cm^3
64mL=64cm^3
5 0
3 years ago
Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the corre
nordsb [41]

Answer:


Step-by-step explanation:

for right-angled triangle: a^2 + b^2 = c^2

given a = 5 n b = 10

c^2 = 5^2 + 10^2

= 25 + 100

= 125

c = sqrt(125)

= 5*sqrt(5)

4 0
3 years ago
Read 2 more answers
What is the constant of proportional
Bond [772]

Answer:

The constant value (often written k) relating amounts that rise or fall uniformly together. It is the ratio of the amounts y and x: k = y/x. Put another way: y = kx.

5 0
3 years ago
Compare |0.47| and |-0.51|
Paraphin [41]

Answer:

A is the correct answer

Step-by-step explanation:

As the question is asking what simple is the correct one and the lines sorry I forgot what the name of them is. Then lines make negatives positive it does not effect a positive number as the number is positive.

7 0
3 years ago
Other questions:
  • Suppose that
    14·1 answer
  • MATH HELP PLEASE 50 POINTS
    5·2 answers
  • Suppose you buy flour and cornmeal in bulk to make flour tortillas and corn tortillas. Flour costs $1.50 per pound and cornmeal
    12·1 answer
  • What is the area of the composite figure?
    12·1 answer
  • The circumference of a circle is 176m.find its diameter​
    13·1 answer
  • There is a "buy 3 get 1 free" sign for candy bars at the store. Each candy bar cost $0.50. What os the price of 12 candy bars?
    10·1 answer
  • How do you multiply(2x+3)(x-7)
    14·1 answer
  • There are 10 guests at Alexandra's party. If each guest will be served exactly pint of
    12·1 answer
  • Make q the subject <br> p=6q+7
    8·2 answers
  • Please answer to this question I will mark you as brainlist ​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!