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Question: How do I collect these terms?

Question:How do I collect these terms?

Salman Khan 72 Maple
March 12 2007
0
Hi - I'm trying to collect cos(8t) and sin(8t) in the following equation: (-64*a*cos(8*t)-64*b*sin(8*t))*exp(6*t)+65*(a*cos(8*t)+b*sin(8*t))*exp(6*t)+81*c*exp(2*t) but the following command just spits out the same exact thing: collect(lside, [cos(8*x), sin(8*x)]) Any suggestions would be appreciated. Thanks.
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