exam Maths Puzzle Numerical Ability

Please help me solve this equation: A/5=A-3/2

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exam Other Question

Establish the Identity:


(tan(theta)-cot(theta)/tan(theta)+cot(theta))+1=2sin^2(theta)


Any help would be appreciated. I don't even know where to start.
Solve and graph

-3x - 13>-4, D = (Integers)