exam Maths Puzzle Numerical Ability

prove cot^2(x)(sec^2(x)-1)=1

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exam Other Question

This is an odd consecutive integers word problem. I have to solve it using factoring with the principle zero. The problem says "The sum of the squares of two consecutive odd positive integers is 394. Find the integers." COuld you please help me. Solve and graph the solution set.
11x + 2 "is greater than or equal to sign" 10x + 13