6. 40 what is cos 0 ? 9 If 540°<0<630° and tan 0=: 1 II

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
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**Trigonometry Question**

**Objective:**
Determine the value of \( \cos \theta \) given certain constraints on \( \theta \) and \( \tan \theta \).

**Problem Statement:**
If \( 540^\circ < \theta < 630^\circ \) and \( \tan \theta = \frac{40}{9} \), what is \( \cos \theta \)?

**Multiple Choice Options:**

1. \( \frac{9}{41} \)
2. \( \frac{9}{7\sqrt{31}} \)
3. \( -\frac{9\sqrt{31}}{217} \)
4. \( \frac{40\sqrt{31}}{217} \)
5. \( 617^\circ \)

**Hint:**
Recall the trigonometric identities and relationships between the tangent and cosine functions to derive the correct value. Ensure the angle \( \theta \) is converted into the correct range for easier calculation.
Transcribed Image Text:**Trigonometry Question** **Objective:** Determine the value of \( \cos \theta \) given certain constraints on \( \theta \) and \( \tan \theta \). **Problem Statement:** If \( 540^\circ < \theta < 630^\circ \) and \( \tan \theta = \frac{40}{9} \), what is \( \cos \theta \)? **Multiple Choice Options:** 1. \( \frac{9}{41} \) 2. \( \frac{9}{7\sqrt{31}} \) 3. \( -\frac{9\sqrt{31}}{217} \) 4. \( \frac{40\sqrt{31}}{217} \) 5. \( 617^\circ \) **Hint:** Recall the trigonometric identities and relationships between the tangent and cosine functions to derive the correct value. Ensure the angle \( \theta \) is converted into the correct range for easier calculation.
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