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tekilochka [14]
3 years ago
6

What is the exact value of cos 45° ?

Mathematics
2 answers:
kipiarov [429]3 years ago
5 0

Answer:

sqrt{2}/2

Step-by-step explanation:

Georgia [21]3 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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Find the missing number in the proportion.
Soloha48 [4]

Answer: 7

Step-by-step explanation: Cross multiply, so 15 times x and 21 times 5. 21 times 5 is 105 then you divide by 15 which gives you 7.

8 0
3 years ago
? numbers can be written as a product of ? factors. this is called the prime factorization of a number
muminat
The complete sentence should be:

<span><em>Composite</em> numbers can be written as a product of <em>prime</em> factors. This is called the prime factorization of a number.

A prime number is a number that can't be divided by any other number other than 1 or itself. Otherwise, that is a composite number. For example, 50 is a composite number. Through prime factorization,

                  50
                 /   \
               10  5
               /  \
             5  2

The prime factors of composite number 50 are 5, 5 and 2.</span>
5 0
3 years ago
the third side of an isosceles triangle is 8 inches shorter than the other two sides the perimeter of the triangle is 70 inches
dezoksy [38]
Isosceles triangle has 2 sides that are the same length. So what you have is three sides that measure: x, x, and (x-8). 70 = x + x + (x-8).
70 = x + x + x - 8
78 = 3x
x = 26.
and 26 - 8 = 18.
So two of your sides are 26 inches and the last side is 18 inches. 
8 0
3 years ago
Read 2 more answers
The standard form of the equation of a parabola is y = x2 - 8x + 29. What is the vertex form of the equation?
Bess [88]
Y = x² - 8x + 29
y = (x² -8x +4²) + 29 -4² . . . . add and subtract the square of half the x-coefficient
y = (x -4)² + 13 . . . . . . . . . . . . simplify

The appropriate choice is
  C. y = (x - 4)² + 13
7 0
3 years ago
Read 2 more answers
How to draw model of 3 × 40
dangina [55]
You could try an Array or Area

7 0
3 years ago
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