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cos 30 =√3/2 ............
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Answer:
30°
Step-by-step explanation:
Draw an equilateral triangle with side 2.
Cut it in half.
Now you have a right angled triangle with hypotenuse 2 and one side of length 1. Pythagoras' Theorem gives the other side is √3.
From this triangle, you have
cos 30° = √3 / 2
So
arccos (√3 / 2) = 30°
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