What is expand sin(3u)sin(3(t-u)) ?

The solution to expand sin(3u)sin(3(t-u)) is sin(3t-3u)sin(3u)

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expand sin(3u)sin(3(t-u))

expand

sin (3 u) sin (3 (t - u))

sin (3 t - 3 u) sin (3 u)

Solution steps

sin (3 u) sin (3 (t - u))

Expand

3 (t - u) : 3 t - 3 u

= sin (3 t - 3 u) sin (3 u)

\frac{( z - 2 ) ^{2}}{( z + 1 ) ( z + 2 )}

\frac{1}{x ^{2}} (x^{2} + y^{2} = 9) (\frac{1}{y ^{2}})

\frac{d ^{2}}{d t ^{2}} ((y^{2}) (y t^{3} - 1.5 y))

\frac{4 x ^{2} + 8 x - 6}{( x + 3 ) ^{2} ( x - 3 )}

\frac{1}{cos ^{2} ( x )}

What is expand sin(3u)sin(3(t-u)) ?
The solution to expand sin(3u)sin(3(t-u)) is sin(3t-3u)sin(3u)