List the six trigonometric function values of the following angle. Provide exact values. When necessary, rationalize the denominator.
840°

• A. sin 840° = -(√2)/2, cos 840° = 1/2, tan 840° = -√2, cot 840° = (-√2)/2, sec 840° = 2, csc 840° = -√2
• B. sin 840° = (√2)/2, cos 840° = -1/2, tan 840° = -√2, cot 840° = (-√2)/2, sec 840° = -2, csc 840° = √2
• C. sin 840° = -(√3)/2, cos 840° = 1/2, tan 840° = -√3, cot 840° = (-√3)/3, sec 840° = 2, csc 840° = -(2√3)/3
• D. sin 840° = (√3)/2, cos 840° = -1/2, tan 840° = -√3, cot 840° = (-√3)/3, sec 840° = -2, csc 840° = (2√3)/3