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Maths Puzzle
Numerical Ability
what is the easiest way to subtract 27 1/2 liters from 18 5/8?
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book Other Question
a/bc + b/ac - c/ab = ?
The question is: evaluate exactly without the use of your calculater. Be sure to show all your work.
cos(2pi/3)
b) cot 17pi/6
c) sin 135 degrees
d) sec (-540 degrees)