exam Maths Puzzle Numerical Ability

Find sin A if cos A = 8 over 9 and A is in quadrant 4.

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exam Other Question

The sum of the digits of a two-digit numeral is 8. If the digits are reversed, the new number is 18 greater than the original number. Find the original number. In 1921, President Taft decided that the ratio of the length to the height of an American flag should be 1 to 1.9. If a flag is 25 square feet, how long and tall is it?