A(t)=cos(t/2)
v(t)=∫cos(t/2)dt+C=2sin(t/2)+C
v(<span>2π/3)=2sin(</span><span>2π/6)+C</span>=√3
2sin(π/3)+C=√3
2*√3/2+C=√3
C=0
v(t)=2sin(t/2)
x(t)=∫2sin(t/2)dt+C=-4cos(t/2)+C
x(2π/3)=-4cos(2π/6)+C=2
-4cos(π/3)+C=2
-4/2+C=2
-2+C=2
C=4
x(t)=-4cos(t/2)+4
-199,-198,-197,-196,-195,-194,-193,-192,-191
<span>1- cosa/ sina = 1 - ctga</span>