exam Maths Puzzle Numerical Ability

if secA=5/4,verify that 3sinA-4sin3A/4cos3A-3cosA

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exam Other Question

f(x)=5x-1


f(x-h)-f(x)
___________
h
Simplify:


((x^(3/2))y^-3)^1/3
--------------------
((x^(1/2))y^-6)^-1

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