### Author Topic: TUT0402 question  (Read 561 times)

#### shangluy

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##### TUT0402 question
« on: October 11, 2019, 02:00:04 PM »
Find the Wronskian of $cos^2\theta$ and $1 + cos2\theta$

Let $f = cos^2\theta$ and $g = 1 + cos2\theta$, then

since $W = fg' - f'g$, we get
Therefore the Wronskian of $cos^2\theta$ and $1 + cos2\theta$ is $0$