Question 533411
name a value of x between 0 and 2 pi for which y=cos 2x is 0
cos2x=0
2x=&#960;/2, 3&#960;/2, 5&#960;/2 and 7&#960;/2
x=&#960;/4, 3&#960;/4, 5&#960;/4 and 7&#960;/4