Ответ

Автор - SergeiDan
1.f'(x)=5sin^4(x)*cos(x)
f'(pi/3)=5sin^4(pi/3)*cos(pi/3)=5*(sqrt(3)/2)^4*1/2==5*9/16*1/2=45/32
2.f'(x)=2/(cos^2(2x-pi/3))
f'(pi/6)=2/(cos^2(0))=2

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