exam Maths Puzzle Numerical Ability

Clara earned $360 in simple interest on a 12 month bank certificate of deposit. if the interest rate had been 3% higher, she would have earned the same amount of money by depositin

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exam Other Question
Been trying to verify this identity:

cot(x) / 1 + sin(x) = csc(x) * sec(x) - sec(x)

Any pointers would be appreciated. Please help with factoring the polynomial 4x^7+4x^5+x^4+x^2.