exam Maths Puzzle Numerical Ability

if tanX=(asinY)/(1-acosY) and tanY=(bsinX)/(1-acosX) then show that (sinX/sinY)=(X/Y)

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exam Other Question

37. Business and finance.
Suppose you have two part-time jobs. One is at a video store that pays $9 per hour and the other is at a convenience store that pays $8 per hour. Between evaluate if x=-1 and y=3

y-7x over 6x+xy

simplify x^-6 over y^-5
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