Solve the equation in the interval [0°, 360°). Give solutions to the nearest tenth, if necessary.2 cos3? = cos ?
A. {45°, 135°, 225°, 315°}
B. {90°, 270°}
C. {45°, 90°, 135°, 225°, 270°, 315°}
D. ?
Answer: C
Mathematics
You might also like to view...
Solve the linear system using an inverse matrix. x + 2y + 3z = -11 x + y + z = -42x + 2y + z = -2
A. (7, -28, -17) B. (-44, 8, -2) C. (-3, 5, -6) D. (-29, -35, -10)
Mathematics
Find the difference and simplify the answer. 
- 
A. 3015
B. 
C. 8
D. 
Mathematics
Factor the expression completely. If the polynomial is prime, state this as your answer.16x4 - 54x
A. 2(2x - 3)(4x2 + 6x + 9) B. 2x(2x - 3)(4x2 + 6x + 9) C. 2x(2x - 3)(4x2 - 6x + 9) D. 2x(2x + 3)(4x2 - 6x + 9)
Mathematics
Write the fraction as a decimal. Round to the nearest thousandth if necessary.
A. 0.469 B. 0.047 C. 2.133 D. 4.688
Mathematics