Question

how do i find the zeros of y=xcos2x?

Answer 1

is it xcos2x or xcos^2x

Answer 2

xcos2x

Answer 3

here is easy method,
graph it
then check all the values which equals 0
here they r 0, -pi/4 and pi/4

Answer 4

but how do i do it algebraically

Answer 5

\[x \cos(2x) = 0\]
we know if we use x = 0 everything is gonna be 0...so our first answer is 0
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