67. 4 cos lx - 2T = 2 cos-1x

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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How to I find the exact solution for #67
TT
\ 55. f(x)
= -2 cos (3x); 0 s x <
3
TT
TT
< x <
57. f(x)
- tan (x + 1) - 3; -1
1
1
TT
59. f(x) = 3 sin (2x + 1);
%3D
4
4
In Problems 61- 68, find the exact solution of each equa
61. 4 sinlx = T
62. 2
Find
64. -6 sin (3x) = 7
65. 3
-1
67. 4 cos lx - 2T = 2 cos
Applications and Extensions
In Problems 69–74, use the following discussion. The fo
cos (tan i tan 0)
D = 24 1
TT
can be used to approximate the number of hours of d.
D when the declination of the Sun is i° at a location 0°
latitude for any date between the vernal equinox and aur
equinox. The declination of the Sun is defined as the
between the equatorial plane and any ray of light from th
The latitude of a location is the angle 0 between the E
and the location on the surface of Earth, with the vertex
angle located at the center of Earth. See the figure, To
formula cos-1(tor
Transcribed Image Text:TT \ 55. f(x) = -2 cos (3x); 0 s x < 3 TT TT < x < 57. f(x) - tan (x + 1) - 3; -1 1 1 TT 59. f(x) = 3 sin (2x + 1); %3D 4 4 In Problems 61- 68, find the exact solution of each equa 61. 4 sinlx = T 62. 2 Find 64. -6 sin (3x) = 7 65. 3 -1 67. 4 cos lx - 2T = 2 cos Applications and Extensions In Problems 69–74, use the following discussion. The fo cos (tan i tan 0) D = 24 1 TT can be used to approximate the number of hours of d. D when the declination of the Sun is i° at a location 0° latitude for any date between the vernal equinox and aur equinox. The declination of the Sun is defined as the between the equatorial plane and any ray of light from th The latitude of a location is the angle 0 between the E and the location on the surface of Earth, with the vertex angle located at the center of Earth. See the figure, To formula cos-1(tor
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