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Ch. 3 - Radian Measure and The Unit Circle
Lial - Trigonometry 12th Edition
Lial12th EditionTrigonometryISBN: 9780136552161당신이 사용하는 게 아니라요?교과서 변경
4장, 문제 77

Find the exact values of s in the given interval that satisfy the given condition.


[-2π , π) ; 3 tan² s = 1

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1
Start by writing down the given equation: \(3 \tan^{2} s = 1\).
Isolate \(\tan^{2} s\) by dividing both sides of the equation by 3: \(\tan^{2} s = \frac{1}{3}\).
Take the square root of both sides to solve for \(\tan s\): \(\tan s = \pm \frac{1}{\sqrt{3}}\).
Recall that \(\tan s = \pm \frac{1}{\sqrt{3}}\) corresponds to specific reference angles where tangent has these values. Identify these angles within one full period of tangent, which is \(\pi\).
Find all values of \(s\) in the interval \([-2\pi, \pi)\) by adding integer multiples of \(\pi\) to the reference angles, and then select those that lie within the given interval.

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주요 개념

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