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Ch. 3 - Radian Measure and The Unit Circle
Lial - Trigonometry 12th Edition
Lial12th EditionTrigonometryISBN: 9780136552161, 9780135440780, 9780136881117, 9780135440827, 9780135924891Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoLial 12th EditionCh. 3 - Radian Measure and The Unit CircleProblema 3.55
Capitolo 4, Problema 3.55

Find the approximate value of s, to four decimal places, in the interval [0, π/2] that makes each statement true.
cot s = 0.5022

Guida verificata passo dopo passo
1
Recognize that \( \cot(s) = \frac{1}{\tan(s)} \). Therefore, \( \tan(s) = \frac{1}{0.5022} \).
Calculate \( \tan(s) \) using the reciprocal of 0.5022.
Use a calculator to find the angle \( s \) in radians for which \( \tan(s) \) equals the calculated value.
Ensure that the angle \( s \) is within the interval \([0, \frac{\pi}{2}]\).
Round the value of \( s \) to four decimal places.

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Cotangent Function

The cotangent function, denoted as cot(s), is the reciprocal of the tangent function. It is defined as cot(s) = cos(s)/sin(s). In the context of the unit circle, cotangent represents the ratio of the adjacent side to the opposite side in a right triangle. Understanding cotangent is essential for solving equations involving angles and their trigonometric ratios.
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Percorso guidato
5:37
Introduction to Cotangent Graph

Inverse Trigonometric Functions

Inverse trigonometric functions, such as arccot or cot^(-1), are used to find the angle that corresponds to a given trigonometric ratio. For example, if cot(s) = 0.5022, we can use the inverse cotangent function to determine the angle s. These functions are crucial for solving equations where the angle is unknown and must be derived from a known ratio.
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Introduction to Inverse Trig Functions

Interval [0, π/2]

The interval [0, π/2] represents the range of angles from 0 to 90 degrees, where all trigonometric functions are positive. This interval is significant when solving trigonometric equations because it restricts the possible values of s, ensuring that the solution is within the first quadrant. Understanding the implications of this interval helps in determining the correct angle that satisfies the given cotangent value.
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Example 2
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