Question

SINt=0,6 найти sin2t,Cos2t,tg2t

Answer 1

$cost= sqrt{1-sin^{2}t}= sqrt{1-0.36}=0.8$
sin2t=2sint*cost=2*0.6*0.80=0.96
$cos2t=cos^{2}t-sin^{2}t=0.64-0.36=0.28$
$tg2t= frac{sin2t}{cos2t}= frac{0.96}{0.28}= frac{24}{7}$