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Usually you can get the sine or cosine of an angle from a calculator very quickly. However, many calculators won't tell you that the result, which is about 0.707, is exactly 1 / square root of 2, or the equivalent square root of 2 / 2.

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Wiki User

12y ago

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Cos(450) = 1/(2)1/2 = 0.707

What_is_cos_45

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Wiki User

12y ago
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Cos(45 degrees) = [sqrt(2)] / 2 = 0.7071....

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lenpollock

Lvl 16
9mo ago
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.707

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Anonymous

4y ago
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Q: What is cos 45 degrees?
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