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i have to show that

[tex] \sin \left( 1/9\,\pi \right) \sin \left( 2/9\,\pi \right) \sin \left(

1/3\,\pi \right) \sin \left( 4/9\,\pi \right) = 3/16 [/tex]

i ve tried so many things, and i couldnt get to 3/16 , does anyone have any hints that are gonna help me solve problems in that kind!? thanks!

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# Homework Help: Math trig problem

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