74.5k views
1 vote
The sound wave of two music notes can be represented by the function y = 2sin2x and y = −sin x, where x represents the time since the note is played. At what times will the frequencies of the sound waves be the same in the interval [0°, 360°)?

x = 0°, 30°, 90°, 150°
x = 0°, 90°, 210°, 330°
x = 30°, 150°, 180°, 270°
x = 180°, 210°, 270°, 330°

User Oy
by
7.4k points

1 Answer

4 votes

Answer:

x = 0°, 180°, 210°, 330°

If you were to graph the two functions those would be the intersection points (after converting from radians to degrees)

User EYe
by
8.1k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.