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What is the fundamental period of the function tan(2x)?

Answer and explanation

Correct answer: π/2

The governing property is that tangent has fundamental period π: tan(θ + π) = tan θ. For a transformed function tan(kx), the least positive period T must satisfy kT = π, so T = π/|k|. Here k = 2, giving T = π/2. Directly, tan(2(x + π/2)) = tan(2x + π) = tan(2x), which verifies that π/2 is a period. It is fundamental because no smaller positive shift can produce the required π change in the tangent argument for every x. Therefore option A is correct. π is also a period, but it is twice the least positive period; 2π is still larger, and 2π/3 does not produce a fixed π multiple in the argument. The multiplier 2 compresses the period rather than enlarging it.

Related tags

MathematicsTrigonometric FunctionsPeriodTangentTrigonometric Functions And Their PropertiesClass 12 Mcq

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