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3 years ago

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

sin

)

(

cos

−

sin

)

cos

−

sin

Apply the pythagorean identity

cos

sin

(

cos

−

sin

)

cos

−

sin

cos

−

sin

cos

−

sin

Hopefully this helps!

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Select all correct answers

Luden [163]

<h2>Answer = </h2><h2> $= \frac{1}{y {}^{5} x {}^{2} }$ </h2>

Step-by-step explanation:

Greetings !

simplify for variable y first

apply exponent rule

$a {}^{b} .a {}^{c} = a {}^{b +c \\ } \\ y {}^{ - 8}y {}^{5} = y {}^{ - 8 + 3}$

Add/subtract the numbers -8+3=5

$= y {}^{5}$

Apply exponent rule

$a {}^{ - b} = \frac{1}{a {}^{b} }$

Thus,

$y {}^{ - 5} = \frac{1}{y {}^{5} }$

secondly, simplify for the variable x

Apply exponent rule as we made on y

$x {}^{ - 2}$

$x {}^{ - 2} = \frac{1}{x {}^{2} }$

multiply bot the values we get

Hope it helps!

5 0

1 year ago

Please help me anyone

Vera_Pavlovna [14]

Answer:

Step-by-step explanation:

2x=x+25

2x-x=25

x=25

5 0

2 years ago

2x(9-5x) - (-4x-36x)

allochka39001 [22]

I got 48x
First by distributing 2x to 9-5x=
18x-10x
Then adding a 1 in front of - making -4x-36x to 4x+36x=40x
8x+40x=48x

7 0

3 years ago

Need help with this question, if you don’t know it don’t answer it please

Lerok [7]

Answer:

Step-by-step explanation:

9 x 3 x 2 = 54

7 0

2 years ago

Read 2 more answers

Irina rode her bike to work at an average speed of 16 miles per hour. It started to rain, so she got a ride home along the same

Sedaia [141]

Answer:

0.7 hours

Step-by-step explanation:

Given that Irina was able to make the same distance from work to home in 0.4 of an hour at 27 miles per hour, we can use this rate and time to find the distance she travels to and from work using the general formula:

d = rt, where d=distance, r = rate and t = time

d = 27(0.4) = 10.8 miles

Since the distance from Irina's home to work is 10.8 miles, we can again use the formula 'd = rt' to find the time it takes her to bike to work at a rate of 16 miles per hour and solving for time, 't':

10.8 = (16)t

t = 0.7 hours

3 0

3 years ago