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What is the fundamental period of cot θ?

Answer and explanation

Correct answer: π

The fundamental period is the smallest positive T that leaves a function unchanged wherever it is defined. Since cot θ = cos θ/sin θ, adding π changes both numerator and denominator signs: cot(θ + π) = cos(θ + π)/sin(θ + π) = (−cos θ)/(−sin θ) = cot θ. Thus π is a period. It is fundamental because no smaller positive shift works for every angle; in particular, a shift of π/2 changes cotangent into a related but generally different expression. A shift of 2π or 3π also repeats the values, but those are larger than the least positive period. Therefore option A, π, is correct. The same period applies to tan θ because both functions repeat after a half-turn.

Related tags

Trigonometric-FunctionsPeriodCotangentTrigonometric Functions And Their PropertiesTrigonometric FunctionsMathematicsClass 12 Mcq

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