exam Maths Puzzle Numerical Ability

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3(-2-3x)=-9x-4

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exam Other Question

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You are given 12 to 1 odd against hitting a solid 17 on Roulette number. This means that you win $12 if you succeed and you lose $1 if you fail. Calculate the expected value for one roll. HOW DO YOU SOLVE TAN(-3/4pi), sin(x-1/2pi), sin(5pi/3), tan(5pi/6), sin(pi-x)
tan(1/2pi-x), cos(4pi-x), cos(x+3/2pi), tan(x+1/2pi), sin(-2/3pi), cos{-5/4pi},
tan(5pi/6), cos(7pi