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svet-max [94.6K]
4 years ago
10

Rewrite

iddle" class="latex-formula"> so that it involves only the first power of cosine
Show work and reasoning. Please helpp
Mathematics
1 answer:
yulyashka [42]4 years ago
3 0

sin^4 x = sin^2 x * sin^2 x

sin^4 x = (1 - cos^2 x)(1 - cos^2 x)

sin^4 x = (1 - cos x)(1 + cos x)(1 - cos x)(1 + cos x)

sin^4 x = (1 - cos x)2 * (1 + cos x)^2

Either of the last two equivalent expressions will work, as they both only involve cosine to the first power.

You might be interested in
a) 3∕5= 60∕100= 40% (resolvido) b) 11∕4= c) 4∕20= d) 9∕5= e) 10∕200= 5∕100= 5% (resolvido) f) 8∕200= g) 30∕300=
Assoli18 [71]

Answer:

En cada expresión queremos obtener 100 en el denominador.

Notar que en la primer eq. tendríamos:

a) 3/5 = (20/20)*(3/5) = (20*3)/(20*5) = 60/100 = 0.6  (corresponde a 60%)

b) 11/4 = ?

Acá el denominador es 4

tenemos que encontrar un número k tal que:

k*4 = 100

k = 100/4 = 25

Entonces podemos multiplicar denominador y numerador por 25.

11/4 = (25/25)*(11/4) = (25*11)/(25*4) = 275/100 = 2.75 (corresponde a 275%)

c) 4/20

el denominador es 20, entonces tenemos que resolver:

20*k = 100

k = 100/20 = 5

multiplicamos denominador y numerador por 5:

(5/5)*(4/20) = (5*4)/(5*20)  =  20/100 = 0.2  (corresponde al 20%)

d) 9/5

el denominador es 5, entonces debemos resolver:

5*k = 100

k = 100/5 = 20

Debemos multiplicar denominador y numerador por 20

(20/20)*(9/5) = (20*9)/(20*5) = 180/100 = 1.8  (corresponde a 180%)

e) 10/200 = 5/100 = 0.05  (corresponde al 5%)

f) 8/200

Se resuelve de similar forma al de arriba (que ya tenias resuelto).

Aca el denominador eso 200, entonces tenemos que tener:

200*k = 100

k = 100/200 = 1/2

Entonces multiplicamos numerador y denominador por 1/2

(1/2/1/2)*(8/200) = (8*1/2)/(200*1/2) = 4/100 = 0.04 (corresponde al 4%)

g) 30/300

aca el denominador es 300

Entonces:

300*k = 100

k = 100/300 = 1/3

Multiplicamos numerador y denominador por 1/3

(1/3/1/3)*(30/300) = (30*1/3)/(300*1/3) = 10/100 = 0.1  (corresponde al 10%)

3 0
3 years ago
What is 0.70 simplest form
Arturiano [62]
7/10 because there is two places after the decimal point making it 100 so move the decimal point two places to the right which makes it 70 and 70/100 in simplest form is 7/10 <span />
3 0
3 years ago
michelle divided 1 pizza into equal slices to share with his friends.they ate the entire pizza. which expression could not repre
user100 [1]
The answer is c. you should know 
3 0
3 years ago
What is 30 percent of 38
stepladder [879]

Answer: 11.4

Simply multiply 38 by .30 to find the percentage of the number.

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which unit of measure would be appropriate for the area of a soccer field that is 105 meters long and 67 meters wide
GREYUIT [131]

Answer:

67 × 105 = 7035. The answer for the area would be 7,035 square meters.

3 0
3 years ago
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