Application of Circular Functions to Angles Find the area of the circular segment in example 6 of this lesson of angle AOB is 90° .

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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Example 6 – Find the area of a circular segment bounded by chord AB and minor arc ACB whose radius is 6 cm and central angle of 60°

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K = πr2 D /360                                              Area of triangle AOB    

= π 62 60/360 =  18.85 cm2                          h = √ 62 – 32 = √ 27  b = 6    

Asegment =  18.85 – 15.59 = 3.26 cm2        A = ½ (6)(√27) = 15.59 cm2 

Application of Circular Functions to Angles
Find the area of the circular segment in example 6 of this
lesson of angle AOB is 90° .
A search light with a range of 350 meters can turn through an
angle of 120°. Find the area it can cover.
Two concentric circles have radii of 5 cm and 7 cm. Find the
area of the portion of the sector of the larger circle which is
outside the smaller circle when the central angle is 45°
Transcribed Image Text:Application of Circular Functions to Angles Find the area of the circular segment in example 6 of this lesson of angle AOB is 90° . A search light with a range of 350 meters can turn through an angle of 120°. Find the area it can cover. Two concentric circles have radii of 5 cm and 7 cm. Find the area of the portion of the sector of the larger circle which is outside the smaller circle when the central angle is 45°
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