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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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Jeremy is reading a 60-page book. He read the first 20 pages in 30 minutes. If Jeremy continues to read a the same rate, how lon
Alex73 [517]

It will take total 90 minutes to finish the book and 60 minutes to read the left 40 pages.

<h3>What is Ratio and Proportion ?</h3>

When two numbers can be written as p/q is called a Ratio , and when two ratios are equal they are said to be in proportion .

It is given that

Jeremy is reading a 60-page book.

The time taken to read  20 pages is 30 minutes

Then it can be written as 20:30 = 2:3

The rate of reading is same so To read the rest 40 pages is given by

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40: x = 2:3

40*3/2 = x

x = 60 minutes

Therefore it will take total 90 minutes to finish the book and 60 minutes to read the left 40 pages.

To know more about Ratio and Proportion

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2 years ago
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3 years ago
A rectangular prism has a length of 3 feet, a height of 7 feet, and a width of 14 feet.
MA_775_DIABLO [31]

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allen has a debt of 500$.He owes equal amounts to 10 different people. Express his debt to one person as a negative number.
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