Find the exact value of the expression given below. cos(- 105°) Rewrite the expression using a sum or difference formula. Choose the correct answer below. A. cos(- 105°) = cos ((- 60°) + (- 45°)) = cos (- 60°)( cos - 45°) + sin (- 60°)( sin - 45°) B. cos(- 105°) = cos ((- 60°) + (- 45°)) = sin (- 60°)( cos - 45°) + cos (- 60°)( sin - 45°) c. cos(- 105°) = cos ((- 60°) + (– 45°)) = cos (- 6o°)( cos - 45°) - sin (- 60°)( sin - 45°) O D. cos(- 105°)= cos ((-60°) + (-45°)) = sin (- 60°)( cos - 45°) - cos (-60°)( sin - 45°)
Find the exact value of the expression given below. cos(- 105°) Rewrite the expression using a sum or difference formula. Choose the correct answer below. A. cos(- 105°) = cos ((- 60°) + (- 45°)) = cos (- 60°)( cos - 45°) + sin (- 60°)( sin - 45°) B. cos(- 105°) = cos ((- 60°) + (- 45°)) = sin (- 60°)( cos - 45°) + cos (- 60°)( sin - 45°) c. cos(- 105°) = cos ((- 60°) + (– 45°)) = cos (- 6o°)( cos - 45°) - sin (- 60°)( sin - 45°) O D. cos(- 105°)= cos ((-60°) + (-45°)) = sin (- 60°)( cos - 45°) - cos (-60°)( sin - 45°)
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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Find the exact value of the expression given below.
cos(−105°)
Rewrite the expression using a sum or difference formula. Choose the correct answer below.
Transcribed Image Text:Find the exact value of the expression given below.
cos( - 105°)
Rewrite the expression using a sum or difference formula. Choose the correct answer below.
O A. cos(- 105°) = cos ((- 60°) + (- 45°)) = cos (– 60°)( cos - 45°)+ sin (- 60°)( sin – 45°)
O B. cos(- 105°) = cos ((- 60°) + (– 45°)) = sin (- 60°)( cos - 45°) + cos (- 60°)( sin - 45°)
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OC. cos(- 105°)= cos (( – 60°) + ( – 45°)) = cos (- 60°)( cos - 45°)- sin (- 60°)( sin - 45°)
O D. cos(- 105°) = cos ((- 60°) + (- 45°)) = sin (– 60°)( cos - 45°)- cos (- 60°)( sin - 45°)
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%3D
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