How do we know the angle of 45 degrees is always equal to the square root of 2 over 2?

Question

Mathematics

Jazmin Bean

31 October, 23:23

How do we know the angle of 45 degrees is always equal to the square root of 2 over 2?

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Answers (1)

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Presley Maynard · Answer 1

The question is not correct, you mean the the sine and cosine of 45 degrees is always square root 2 over 2.

Well you need to know how the sine and cosine are calculated. I would search in google for "sine and cosine in a unit circle". There is a very good Khan academy video that explains this in 10 minutes. Watch and learn : - )