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3 years ago

9

Sin 3pi divided by 4

1 answer:

KATRIN_1 [288]3 years ago

6 0

Sin 3pi/4 is angle 135 degrees or 45 degrees below 180 degrees. Hence it's opposite side is 1 and adjacent is 1, implying the hypothenus is sqrt(2). Hence

Sin 3pi/4 = 1/sqrt(2). Now multiply by sqrt(2)/sqrt(2) to get:

[1/sqrt(2).] * [sqrt(2)/sqrt(2)] = sqrt2)/2

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Help with this please

emmainna [20.7K]

$\bf \begin{array}{llll}
step~1&4x=28\\\\
step~2&x=\cfrac{28}{4}\impliedby \textit{she did not divide 28 by 4}
\end{array}
$

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2 years ago

Find the area of the circle below. Use 3.14 for pi

djverab [1.8K]

Answer:

Es igual a 28,26 centímetros2.

Step-by-step explanation:

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2 years ago

Find an equation for the line parallel to 3y+6X=6 and goes through the point (-3,-7) please write in y=mx+b

seropon [69]

Answer: y=-6x-25

Step-by-step explanation:

Find slope of original line by solving for y

3y+6x=6

y+6x=2

y = -6x+2 <--- we have found the slope is -6

Using y-y1 = m (x-x1) find the equation for the parallel line:

y-(-7)= -6(x-(-3)) <--- plug in the point coordinates and slope into the equation and solve for y

y+7=-6x-18

y=-6x-25

5 0

2 years ago

What is each expression written using each base only once? (-4)^-6*(-4)^7

andreyandreev [35.5K]

(-4)^-6*(-4)^7 = (-4)^1 = -4

answer a. -4

6 0

2 years ago

Read 2 more answers

What is the vertex of the graph of the function f(x) = x2 + 8x - 2?

vlabodo [156]

Answer:

Vertex is (-4, -18)

Step-by-step explanation:

f(x) = $ax^{2} +bx +c$

Let (h, k) be the vertex

An easy way to find h is to use the formula h = -b/2a

In your case where f(x) = $x^{2} +8x - 2$ a = 2 and b = 8

So, h = -8/2(1) = -8/2 = -4

Substitue -4 in for x to find k

k = ( $-4^{2}$ ) + 8(-4) - 2

= (16) - 32 - 2

= 16 - 32 - 2

= -18

Vertex is (-4, -18)

Note: Another way to find the vertex is to complete the square, but this can really be difficult in some cases

5 0

2 years ago