book Maths Puzzle Numerical Ability

find the exact value, leaving the answer in a proper form of sin -300 degrees.

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book Other Question

If P(4, -5) is a point on the graph of the function y = f(x), find the corresponding point on the graph of y = 2f(x-6).

Thanks. 1. 4a+5[1-3(2a-1)]=2(2a+5)