Question

пожалуйста! .......................................................................

Answer 1

$R= \frac{a}{2sin a}$

$2sin a=\frac{a}{R}$

$sina=\frac{a}{2R}$

Если a=0.6, а R=0.75, то

$sina=\frac{0.6}{2*0.75}$

$sina= \frac{0.6}{1.5}$

$sina=\frac{2}{5}$