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Given cos x= 1/4 with 0 < x < pi/2 find cos x/2
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Polygon abcd is a parallelogram, and m? abc = 127°. the length of is 10 units, and the length of is 5 units. the perimeter of the parallelogram is units, and m? bcd is °
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Given cos x= 1/4 with 0 < x < pi/2 find cos x/2...
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