Find all values of x in the interval [0°, 360°) that satisfy the equation. Round approximate answers to the nearest tenth of a degree.cos2x + cos x - 1 = 0
A. {103.2°, 145.2°, 283.2°, 325.2°}
B. {51.8°, 308.2°}
C. {49.8°, 130.2°, 229.8°, 310.2°}
D. {70.5°, 109.5°, 180°}
Answer: B
You might also like to view...
Find the derivative.r = 17 - ?8 cos ?
A. 
= 8?7 cos ? - ?8 sin ?
B. 
= 8?7 sin ?
C. 
= - 8?7 cos ? + ?8 sin ?
D. 
= 8?7 sin ? - ?8 cos ?
Solve the problem.Jason purchased rose plants and sunflower plants for his garden. Rose plants cost $9 each, and sunflower plants cost $14 each. If his spending limit was $276, write an inequality to show the possible combinations of rose plants and sunflower plants he could have purchased.
A. 9x + 14y ? 276 B. 9x + 14y ? 276 C. 14x + 9y ? 276 D. 14x + 9y ? 276
Express the area of the region bounded by the given line(s) and/or curve(s) as an iterated double integral.The parabola 
and the line 
A. 
B. 
C. 
D. 
Use the information in the table to solve the problem. Write your answer as a fraction in lowest terms.The table below shows the amounts of pollutants (in parts per million) in a sample of rainwater.
Find the ratio of pollutant D to pollutant B.
A. 
B. 
C. 
D. 