exam Maths Puzzle Numerical Ability

Suggest a cubic that would best approximate a sine wave (f(x) = sin(x)) over the interval 0 less than or equal to x less than or equal to 2pi

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exam Other Question

find the probability for rolling a numbered cube.

P(rolling a 5, then an even number)
decompose into a partial fraction

2x+3+x^2-3x+5/x^2-2x-3