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3 years ago

Just answer #4 (Trigonometry) THANK YOU!!!

Mathematics

2 answers:

Anastasy [175]3 years ago

3 0

Opposite over adjacent
=tan^-1(1.5/3)= theta
angle theta = 26.56505118 degrees.

tigry1 [53]3 years ago

3 0

Opposite over adjacent
=tan^-1(1.5/3)= theta
angle theta = 26.56505118 degrees. is the answer i know:)

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Ayudemen porfavor . Determine 4 ala potencia x + 4 ala potencia -x, si se sabe que 2ala potencia x + 2 ala potencia -x =3

Afina-wow [57]

Answer:

Es igual a 7.

Step-by-step explanation:

Ok, sabemos que:

$2^x + 2^{-x} = 3$

Queremos calcular:

$4^x + 4^{-x}$

Tambien sabemos que 4 = 2*2

Entonces:

$4^x + 4^{-x} = (2*2)^x + (2*2)^{-x}$

y sabemos que 2*2 = 2^2

Entonces:

$4^x + 4^{-x} = (2*2)^x + (2*2)^{-x} = (2^2)^x + (2^2)^{-x}$

y ahora podemos usar la relación:

$(a^n)^m = (a^m)^n = a^{m*n}$

entonces:

$(2^2)^x + (2^2)^{-x} = (2^x)^2 + (2^{-x})^2$

Ahora podemos completar cuadrados sumando y restando el termino:

$2*(2^x)*(2^{-x})$

Asi tendremos:

$(2^x)^2 + (2^{-x})^2 = (2^x)^2 + (2^{-x})^2 + 2*(2^x)*(2^{-x}) - 2*(2^x)*(2^{-x}) = (2^x + 2^{-x})^2 - 2*(2^x)*(2^{-x})$

Entonces de momento tenemos que:

$4^x + 4^{-x} = (2^x + 2^{-x})^2 - 2*(2^x)*(2^{-x})$

Sabemos que el termino que esta dentro del parentesis es igual a 3.

Y tambien podemos usar la propiedad:

$a^n*a^m = a^{n + m}$

en el termino de la derecha.

Asi tendremos:

$(2^x + 2^{-x})^2 - 2*(2^x)*(2^{-x}) = (3)^2 - 2*2^{x + (-x)} = 9 - 2 = 7$

7 0

3 years ago

What value of x makes the equation true?

Aleksandr [31]

♥ Answer: x=-6.9

Solve:
You need to Simplify both sides of the equation.
 $806.265=-116.85x$
Now: Flip the equation.
 $-116.85x=806.265$ 
Lastly Divide both sides by -116.85.
 $\frac{-116.85x}{-116.85} = \frac{806.265}{-116.85}$

Final answer: x=-6.9

6 0

3 years ago

In ΔEFG, the measure of ∠G=90°, GE = 2.1 feet, and EF = 4.8 feet. Find the measure of ∠F to the nearest degree.

trapecia [35]

Answer:

26 degrees

Step-by-step explanation:

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3 years ago

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IceJOKER [234]