# Toronto Math Forum

## MAT244--2019F => MAT244--Test & Quizzes => Quiz-3 => Topic started by: shangluy on October 11, 2019, 02:00:04 PM

Title: TUT0402 question
Post by: shangluy 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 $0$