exam Maths Puzzle Numerical Ability

Verify the identy:


1+tan²x
------- =csc²x
tan²x

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exam Other Question
Simplify:
(9x(^1/2)-x(^1/2))^2 ((2x^2-8)/(2x^2-x-1)/(8x^2-12x-8)/(x^2-1))