2. If cos B=-4/5and it lies in the third quadrant. a) Determine an þxact expression for the other two primary trigonometric ratios. (- b) Determine the primary trigonometric ratios for another angle between 0°and 360°that has the same cosine value. Then, draw the location of both angles. c) Find the two angles, to the nearest degree, using a scientific calculator

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 27E
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2. If cos B=-4/5 and it lies in the third quadrant.
a) Determine an exact expression for the other two primary trigonometric ratios.
b) Determine the primary trigonometric ratios for another angle between 0°and
360°that has the same cosine value. Then, draw the location of both angles.
c) Find the two angles, to the nearest degree, using a scientific calculator
Transcribed Image Text:2. If cos B=-4/5 and it lies in the third quadrant. a) Determine an exact expression for the other two primary trigonometric ratios. b) Determine the primary trigonometric ratios for another angle between 0°and 360°that has the same cosine value. Then, draw the location of both angles. c) Find the two angles, to the nearest degree, using a scientific calculator
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