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Vesna [10]
3 years ago
10

Complete the identity sin(2θ) sin(4θ) cos(2θ) cos(4θ) = ?

Mathematics
1 answer:
Novay_Z [31]3 years ago
4 0

Answer:

Step-by-step explanation:

Factor the left hand side as a difference of squares:

(

cos

2

θ

+

sin

2

θ

)

(

cos

2

θ

−

sin

2

θ

)

=

cos

2

θ

−

sin

2

θ

Apply the pythagorean identity  

cos

2

θ

+

sin

2

θ

=

1

:

1

(

cos

2

θ

−

sin

2

θ

)

=

cos

2

θ

−

sin

2

θ

cos

2

θ

−

sin

2

θ

=

cos

2

θ

−

sin

2

θ

L

H

S

=

R

H

S

Hopefully this helps!

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1 year ago
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7 0
3 years ago
Explain how to write an equival3nt expresion using the associative property<br><br> 2+(11+y)​
nignag [31]

Answer:

13 + y

Step-by-step explanation:

hope i helped :) !

brainliest pleaseee !!?

3 0
3 years ago
If you earn $13/hour and you work 2 hours overtime at a rate of time and a half, how much will you earn for each hour of overtim
ser-zykov [4K]

Answer:

32.50

Step-by-step explanation:

It is simple. You need to know the basics of money, fractions, and well... Math! :)

if you take 13 and multiply it by 2 you get 26

Take the 26 and put it aside ------------->         26

divide 13 in half. that would be 6.50

6.50 + 6.50 = 13      

Now get the 26 -------------------------->  26

and add 6.50 to 26.

That would be 32.50!

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Answer:

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