Find all angles in degrees that satisfy the equation. Round approximate answers to the nearest tenth of a degree.cos 2? = 0.247
A. {
? = 37.8° + k180° or ? = 127.8° + k180°}
B. {
? = 14.3° + k180° or ? = 75.7° + k180°}
C. {
? = 37.8° + k180° or ? = 142.2° + k180°}
D. {
? = 14.3° + k180° or ? = 104.3° + k180°}
Answer: C
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?xk; [3, 11]
A. 
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D. 
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Perform the indicated operation. Simplify if possible.
- 
A. 
B. 
C. 
D. 
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, its 
, and its 
, added together, become 17. What is the quantity?
A. 
B. 
C. 
D. 