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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