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If cos (A / 2) = 2/5 for angle a / 2 with quadrant 1, then the exact value of cos A is:
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Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression
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Rounded to the nearest tenth, what is the value of x
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If cos (A / 2) = 2/5 for angle a / 2 with quadrant 1, then the exact value of cos A is:...
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