27/SPRINGTTRADISical Geometry ICoursesMAC 2311/LEC/HY01-2021/SPRING/TRADITIONJanuary 14-January 20Given that cos(0)2/13and 0 is in Quadrant IV, what is cos(20)?13Select the correct answer below:asearchhp cal GeometryCoursesMAC 2311/LEC/HY01-2021/SPRING/TRADITIONJanuary 14-Januarae to searchhp

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Description: 27/SPRINGTTRADISical Geometry ICoursesMAC 2311/LEC/HY01-2021/SPRING/TRADITIONJanuary 14-January 20Given that cos(0)2/13and 0 is in Quadrant IV, what is cos(20)?13Select the correct answer below:asearchhp cal GeometryCoursesMAC 2311/LEC/HY01-2021/SPR

Answered: Given that cos(0) = 2/13 18, and 0 is…

Trigonometry (11th Edition)

11th Edition

ISBN:9780134217437

Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels

Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels

Chapter1: Trigonometric Functions

Section: Chapter Questions

Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.

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27/SPRINGTTRADIS
ical Geometry I
Courses
MAC 2311/LEC/HY01-2021/SPRING/TRADITION
January 14-January 20
Given that cos(0)
2/13
and 0 is in Quadrant IV, what is cos(20)?
13
Select the correct answer below:
a
search
hp

cal Geometry
Courses
MAC 2311/LEC/HY01-2021/SPRING/TRADITION
January 14-Januar
a
e to search
hp

Expert Solution

Step 1

We can use the following standard trigonometric identity given below:

$\cos (2 θ) = 2 \cos^{2} (θ) - 1$ ......(i)

Also, we are given that:

$\cos (θ) = \frac{2 \sqrt{13}}{13} = \frac{2}{\sqrt{13}}$ ......(ii)

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