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2 years ago

What is the exact value of cos 45° ?

Mathematics

2 answers:

kipiarov [429]2 years ago

5 0

Answer:

sqrt{2}/2

Step-by-step explanation:

Georgia [21]2 years ago

3 0

Let the two sides of a right triangle be equal to one, which means that the hypotenuse is √2

Since cosa=adjacent side / hypotenuse

cos45=1/√2

We can rationalize the denominator by multiplying numerator and denominator by √2

√(2)/2

or if you prefer: √(1/2)

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use the guide to construct a two column proof proving △aec≅△deb, given that ca is parallel to db and e is the midpoint of ad. gi

MrMuchimi

By using the AAA congruence property of Triangles, △aec≅△deb is proved

It is given two triangles, Δaec and Δdeb, where e is the common point known as the midpoint of ad

Also, it is given that,

ca ║db

We need to prove that, △aec≅△deb

Then we'll use AAA congruence property of Triangles to prove the situation

As ca ║db

then, ∠cae = ∠ebd (Alternate angles)

∠ace = ∠edb (Alternate angles)

and ∠aec = ∠deb (common angles)

Thus, by AAA congruence property, △aec≅△deb

Hence, proved

To learn more about, congruence property, here

brainly.com/question/2039214

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5 0

1 year ago

How do I answer this?

alexandr402 [8]

Answer:

there is three parts to this answer

Step-by-step explanation:

this first part is

A= 2.5

B= 49 feet

and finally

C= 0.75 seconds

4 0

3 years ago

write an equation in standard form with integer coefficients for the line with slope 6/11 going through the point (-1,-6)

yKpoI14uk [10]

If the slope is 6/11 then, in y=mx+b form, m will be 6/11. When you multiply 6/11 and -1 you get -6/11. To get the y (-6), you have to add -60/11. So in, y=mx+b form the equation is y=6/11x+(-60/11). To make it standard form, you add negative 6/11x to both sides and then multiply by 11 to get rid of the fractions. So therefore the equation would be:

-6x + 11y = - 60

4 0

3 years ago

A cylindrical hole is drilled into a piece of wood. The radius of the hole is 8 millimeters less than the height, x, of the hole

ipn [44]

Using the solver function of the calculator, we can find the roots of the polynomial.

x1 = 9.72484

x2 = −5.36242+8.74882i

x3 = −5.36242−8.74882i

<span> Since dimension cannot be imaginary, therefore the height of the cylindrical hole is 9.72 mm. Calculating for radius r: r = 9.72 mm – 8 mm r = 1.72 mm The volume of cylinder is given as: V = π r^2 h V = π (1.72)^2 (9.72) <span>V = 90.34 mm^3</span></span>

7 0

2 years ago

Evaluate 4z divided 7 for z=35

Alex787 [66]

Plug 35 in for z. Multiply 4 and 35 to get 140 then divide by 7 to get 20

4 0

2 years ago

Read 2 more answers