Find all values of x in the interval [0°, 360°) that satisfy the equation. Round approximate answers to the nearest tenth of a degree.cos2 x + cos x - 1 = 0
A. {51.8°, 308.2°}
B. {49.8°, 130.2°, 229.8°, 310.2°}
C. {70.5°, 109.5°, 180°}
D. {103.2°, 145.2°, 283.2°, 325.2°}
Answer: A
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Parametric equations and and a parameter interval for the motion of a particle in the xy-plane are given. Identify the particle's path by finding a Cartesian equation for it. Graph the Cartesian equation. Indicate the portion of the graph traced by the particle and the direction of motion.x = 5 sin t, y = 4 cos t, 0 ? t ? 2?
A. 
+ 
= 1
Counterclockwise from (5, 0) to (5, 0), one rotation
B. 
+ 
= 1
Counterclockwise from (0, 4) to (0, 4), one rotation
C. 
+ 
= 1
Counterclockwise from (0, 5) to (0, 5), one rotation
D. 
+ 
= 1
Counterclockwise from (4, 0) to (4, 0), one rotation
Multiply. Be sure your answer is simplified.
? 
A. 
B. 
C. 
D. 
Does the problem involve permutations or combinations? Do not solve.The matching section of an exam has 5 questions and 9 possible answers. In how many different ways can a student answer the 5 questions, if none of the answer choices can be repeated?
A. permutations B. combinations
Answer the question.Is this statement true or false? Why?(1 + 1) - 1 = 1 + (1 - 1)
What will be an ideal response?