exam Maths Puzzle Numerical Ability

Use the fundamental identities to write the expression in terms of a single trigonometric function.

(cscx/sexc - tanx) - (cscx/secx + tanx)

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exam Other Question
Does anyone know how to:

Find the inverse of the function,f(x)=√(7&x ) (seventh root of x).

Thanks Simplify the rational expressions:

x^2-6x+5/x^2-25


x^2-9x+8/2x-4 divided by x^2-1/2x+2


Simplify:

sqrt[64x^10y^2z^46]


Perform the indicated operations:

4sqrt[18] + 2sqrt[32] - sqrt[8]