Pregunta
\( \left[\begin{array}{l}\text { Select your answer } \\ \text { Simplify } \cot \left(\frac{3 \pi}{4}\right) \\ -\infty \\ -1 \\ 0 \\ 1\end{array}\right. \)
Ask by Cummings Dickson. in the United States
Feb 28,2025
Solución de inteligencia artificial de Upstudy
Respuesta verificada por el tutor
Responder
The simplified value of \( \cot\left(\frac{3\pi}{4}\right) \) is \(-1\).
Solución
Calculate the value by following steps:
- step0: Calculate:
\(\cot\left(\frac{3\pi }{4}\right)\)
- step1: Rewrite the expression:
\(-\cot\left(\frac{\pi }{4}\right)\)
- step2: Calculate:
\(-1\)
To simplify \( \cot\left(\frac{3\pi}{4}\right) \):
1. Recall that \( \cot(x) = \frac{\cos(x)}{\sin(x)} \).
2. Calculate \( \cos\left(\frac{3\pi}{4}\right) \) and \( \sin\left(\frac{3\pi}{4}\right) \):
- \( \cos\left(\frac{3\pi}{4}\right) = -\frac{\sqrt{2}}{2} \)
- \( \sin\left(\frac{3\pi}{4}\right) = \frac{\sqrt{2}}{2} \)
3. Now, substitute these values into the cotangent function:
\[
\cot\left(\frac{3\pi}{4}\right) = \frac{\cos\left(\frac{3\pi}{4}\right)}{\sin\left(\frac{3\pi}{4}\right)} = \frac{-\frac{\sqrt{2}}{2}}{\frac{\sqrt{2}}{2}} = -1
\]
Thus, the simplified value of \( \cot\left(\frac{3\pi}{4}\right) \) is \(-1\).
The correct answer is \(-1\).
Respondido por UpStudy AI y revisado por un tutor profesional
Como
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Beyond the Answer
To simplify \( \cot \left(\frac{3 \pi}{4}\right) \), remember that \( \cot \theta = \frac{1}{\tan \theta} \). The angle \( \frac{3 \pi}{4} \) is in the second quadrant, where the sine is positive and the cosine is negative. Specifically, \[ \tan \left(\frac{3 \pi}{4}\right) = \frac{\sin \left(\frac{3 \pi}{4}\right)}{\cos \left(\frac{3 \pi}{4}\right)} = \frac{\frac{\sqrt{2}}{2}}{-\frac{\sqrt{2}}{2}} = -1. \] Thus, \[ \cot \left(\frac{3 \pi}{4}\right) = \frac{1}{\tan \left(\frac{3 \pi}{4}\right)} = \frac{1}{-1} = -1. \] So the answer is \( -1 \).
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