4: Trigonometric Functions - Basic Level \[ \text { Question } 4 \text { of } 9 \] What is the period of \( f(x) \) ?
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The period of a trigonometric function is a fundamental characteristic that tells us how often the function repeats its values. For sine and cosine functions, the period is \( 2\pi \), meaning they complete one full cycle over that interval. If you're working with tangent or cotangent functions, they have a period of \( \pi \). When you have transformations, such as \( f(x) = \sin(kx) \) or \( f(x) = \cos(kx) \), the period changes according to the formula \( \text{Period} = \frac{2\pi}{|k|} \). Always keep performance in mind—varied periods can depict different wave properties, crucial in applications like sound, light, and oscillatory systems.