exam Maths Puzzle Numerical Ability

please help Indicate whether the problem is true or false but show all work
tan 0(with a dash through it) = -cot(90-0(with a dash through it))

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exam Other Question

Solve the rational inequality and submit in interval notation:

x-2/x+1 > x/x+2

I know how to get to one fraction,
-3x+4/(x+2)(x+1)
Then it becomes (after setting equal to How can you write four fives to represent 56?