Find the measures of the angles of the triangle whose vertices are A = (7,2, 4), B = (4, 3, 4), and C = (-7, –8, –5). Measure of angle A is cos^-1(0.5212) Measure of angle B is cos^-1(-0.3871) Measure of angle C is cos^-1(-0.9887)

Find the measures of the angles of the triangle whose vertices are A = (7,2, 4), B = (4, 3, 4), and C = (-7, –8, –5). Measure of angle A is cos^-1(0.5212) Measure of angle B is cos^-1(-0.3871) Measure of angle C is cos^-1(-0.9887)

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter3: Functions And Graphs

Section3.3: Lines

Problem 9E

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9. Need help with the last part

Find the measures of the angles of the triangle whose vertices are A = (7,2, 4), B = (4, 3, 4), and C = (-7, –8, –5).
Measure of angle A is cos^-1(0.5212)
Measure of angle B is cos^-1(-0.3871)
Measure of angle C is cos^-1(-0.9887)

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