Find the derivative of f(x) = sin^2(x) - cos^2(x) + tan^2(x) at x = π/4.
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Write a math question for the unit circle chart: "What is the sine value of the angle π/6?"
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Question: Consider the exponential function f(x) = 3^(2x). Plot its graph with x-values ranging from -2 to 2. How many times does the graph intersect the x-axis?