Use the properties of the sine and cosine to solve the problem.Assume cos(0.67) = 0.78Find sin(0.67), cos(-0.67), and cos(0.67 - 8?).
A. sin(0.67) = 0.63
cos(-0.67) = 0.78
cos(0.67 - 8?) = 0.78
B. sin(0.67) = 0.22
cos(-0.67) = -0.78
cos(0.67 - 8?) = -0.78
C. sin(0.67) = 0.63
cos(-0.67) = -0.78
cos(0.67 - 8?) = -0.78
D. sin(0.67) = -0.63
cos(-0.67) = 0.22
cos(0.67 - 8?) = 0.78
Answer: A
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less than 1
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A. 
? k = 
; 
B. 
? k = 
; 
C. 1
? k - 
= 
; 
D. 1
? k - 
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