value of cos45 in mathematics
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1/√2
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The value of cos of angle 45 degrees in fraction is 1 2 exactly. It is an irrational number and equal to 0.7071067812 … in decimal form. However, the approximate value of cos of 45 degrees is taken as 0.7071 in mathematics. In general, the value of cos ( 45 °) is called as trigonometric function or trigonometric ratio of standard angle.
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