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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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Here's the equation for direct variation. k=y/x    [ f(x)=y]
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A wooden board 100 centimeters long is cut into two pieces. One piece is 16 centimeters longer than the other. What are the leng
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x = the length of one piece

y = the length of the other piece


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