book Maths Puzzle Numerical Ability

express as the same function of a positive acute angle of csc 101 degrees not using a calculator.

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book Other Question

Determine the maximum number of zeros of the polynomial function:
f(x) = 3x2 - 2x - 2x3 - 3
I cannot figure out the solution to what number makes the absolute value of x equal to the negative absolute value of x?
Please help.