a sin bt 2 b sin at ab ( a 2 2 b 2 ) ( s 2 a 2 )( s 2 b 2 )
Chapter 0, Problem 39(choose chapter or problem)
a sin bt 2 b sin at ab ( a 2 2 b 2 ) ( s 2 a 2 )( s 2 b 2 )
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