Solve the equation (x in radians and ? in degrees) for all exact solutions where appropriate. Round approximate answers in radians to four decimal places and approximate answers in degrees to the nearest tenth.cos2 x + 2 cos x = -1
A. 
B. {2n?}
C. {? + 2n?}
D. {n?}
Answer: C
Mathematics
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Find the requested number.Find the number of combinations when 9 objects are taken 6 at a time.
A. 30,240 B. 12 C. 84 D. 504
Mathematics
Provide an appropriate response.(4 - 3x2y)(4 + 3x2y) =
A. 16 - 9x4y2 B. 16 - 9x4y C. 16 + 9x4y2 D. 16 - 9x4y4 E. 4 - 9x2y
Mathematics
Add or subtract. Simplify the answer.
- 
A. 
B. 
C. 
D. 
Mathematics
Rotate the axes so that the new equation contains no xy-term. Graph the new equation.17x2 - 12xy + 8y2 - 68x + 24y -12 = 0
A. 
B. 
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