...............................
<span>tg (-t)×cos t - sin (4П-t)=-tg (t)*cos t-(-sint)=tg (t)*cos(t)+sin(t)=sin t/cost*cost+sint=sint+sint=2sint </span>
<span>(3х(в3)+4х(в кв.)</span>=(3х+2)(х(в кв.)+2х) одинаковое сокращаем и получается от
5/3•5/7–14/3•5/7 5/7(5/3–14/3)
------------------------ = ------------------ =
81/49–9/7•2/7 81/49–18/49
5/7•(-3) 15•49 5
= ---------- = – --------- = – -----
63/49 7•63 3
F'(x) = (<span>x^2+sinx-7</span>)' = 2x + cosx