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| -rw-r--r-- | Fourier Series.page | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Fourier Series.page b/Fourier Series.page index c34281d..4cf9014 100644 --- a/Fourier Series.page +++ b/Fourier Series.page @@ -5,9 +5,10 @@ We first begin with a few basic identities on the size of sets. Show that the se ##Why Fourier series is plausible?</b> To show that Fourier series is plausible, let us consider some arbitrary trignometric functions and see if it is possible to express them as the sum of sines and cosines: -$\qquad1.\quad\sin^2(x) = ?$ +$1.\quad\sin^2(x) = ?$ -Based on the double angle formula, $\cos(2x) = 1 - 2 \sin^2(x)$ +Based on the double angle formula, +$\cos(2x) = 1 - 2 \sin^2(x)$ Rearranging, |