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(81*(sin(x))^2)'The calculation above is a derivative of the function f (x)
(81)'*(sin(x))^2+81*((sin(x))^2)'
0*(sin(x))^2+81*((sin(x))^2)'
0*(sin(x))^2+81*2*(sin(x))^(2-1)*(sin(x))'
0*(sin(x))^2+81*2*(sin(x))^(2-1)*cos(x)
0*(sin(x))^2+81*2*sin(x)*cos(x)
162*sin(x)*cos(x)
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