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
suter [353]
3 years ago
11

Rewrite

x" align="absmiddle" class="latex-formula">
so that it involves only the first power of cosine
​

Mathematics
1 answer:
erastovalidia [21]3 years ago
6 0

All you need is the double angle identity:

\cos^2x=\dfrac{1+\cos2x}2

So we have

\cos^4x=(\cos^2x)^2=\left(\dfrac{1+\cos2x}2\right)^2=\dfrac{1+2\cos2x+\cos^22x}4

Apply the identity again to the squared term:

\cos^4x=\dfrac{1+2\cos2x+\frac{1+\cos4x}2}4=\dfrac{3+4\cos2x+\cos4x}8

You might be interested in
Find a rational number halfway in between two numbers<br><br> 4/7 and 1/8
user100 [1]
I think it’s 5/14 not positive but pretty sure

8 0
4 years ago
Read 2 more answers
Math help please will mark brainliest
Musya8 [376]

Answer:

answer: positive 3

Step-by-step explanation:

when x=-2 y=3

3 0
3 years ago
Help me please<br> Idk what to do
Ber [7]

Answer:

x=36

Step-by-step explanation:

First rewrite equation then multiply each side by 36. 9x-36=4x+144.

then move the variable 9x-4x+36=144. Next subtract 9x and 4x ...5x=144+36.... 5x=180. Lastly you divide 180÷5 this your answer x=36

4 0
3 years ago
Noah wanted to check his solution of x= 14/15 for the equation (7x - 6) = 6x – 10.
aivan3 [116]

Answer:

answer????

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Tìm căn bậc hai của số phức z=1+i√3
Anni [7]

Write <em>z</em> in polar form:

<em>z</em> = 1 + √3 <em>i</em> = 2 exp(<em>i</em> <em>π</em>/3)

Taking the square root gives two possible complex numbers,

√<em>z</em> = √2 exp(<em>i</em> (<em>π</em>/3 + 2<em>kπ</em>)/2)

with <em>k</em> = 0 and <em>k</em> = 1, so that

√<em>z</em> = √2 exp(<em>i</em> <em>π</em>/6) = √(3/2) + √(1/2) <em>i</em>

and

√<em>z</em> = √2 exp(<em>i</em> 7<em>π</em>/6) = -√(3/2) - √(1/2) <em>i</em>

5 0
3 years ago
Other questions:
  • Triangle $PQR$ is isosceles and the measure of angle $R$ is $40^\circ$. The possible measures of angle $P$ are $x,y,z$. What is
    9·1 answer
  • Sergio's internet provider charges its customers $9 per month plus 4¢ per minute of on-line usage. Sergio received a bill from t
    5·1 answer
  • PLEASE HELP!!<br> Does anyone know how to answer this question correctly
    14·2 answers
  • Find the total volume of the figure.
    9·1 answer
  • Suppose a candy bar weighs 5.49 ounces. How much does a pack of 6 bars weigh?
    10·2 answers
  • When multiplying by 10 how many spaces do you move the decimal point
    9·1 answer
  • Todd Lyle worked Monday through Friday from 8:00 A.M. to 5:00 P,M. with an hour off for lunch. He is paid $10,50 an hour. Find h
    15·1 answer
  • 780,000 as a scientific notation
    6·2 answers
  • Determine the measurement of segment XV​
    8·1 answer
  • Assume the radius of a circle is
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!