Tính $x,y$ trong hình vẽ sau:

$\sin 20^\circ  < \sin 70^\circ $

$\sin 20^\circ  > \sin 70^\circ $

$\sin 20^\circ  = \sin 70^\circ $

$\sin 20^\circ  \ge \sin 70^\circ $

$A{B^2} = BH.BC$

$A{C^2} = CH.BC$

$AB.AC = AH.BC$

$A{H^2} = \dfrac{{A{B^2} + A{C^2}}}{{A{B^2}.A{C^2}}}$

$\tan C \approx 0,87$

$\tan C \approx 0,86$

$\tan C \approx 0,88$

$\tan C \approx 0,89$

\(\dfrac{{MN}}{{NP}}\)

\(\dfrac{{MP}}{{NP}}\)

\(\dfrac{{MN}}{{MP}}\)

\(\dfrac{{MP}}{{MN}}\)

$x \approx 8,81$

$x \approx 8,82$

$x \approx 8,83$

$x \approx 8,80$

$BH = 5,4$

$BH = 4,4$

$BH = 5,2$

$BH = 5$

$x = \dfrac{{35\sqrt {74} }}{{74}};y = \sqrt {74} $

$y = \dfrac{{35\sqrt {74} }}{{74}};x= \sqrt {74} $

$x = 4;y = 6$

$x = 2,8;y = 7,2$