sin 36/sin 12 - sin 54/sin 78
sin 36/sin 12 - sin 54/sin 78= (sin 36*sin78 - sin 54*sin 12)/sin 12*sin 78=
(cos 54*cos 12 - sin 54*sin 12)/sin12*cos 12=cos(54+12)/sin 24/2=2cos 66/sin 24=
2sin 24/sin 24=2
Ответ:2
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sin 36/sin 12 - sin 54/sin 78= (sin 36*sin78 - sin 54*sin 12)/sin 12*sin 78=
(cos 54*cos 12 - sin 54*sin 12)/sin12*cos 12=cos(54+12)/sin 24/2=2cos 66/sin 24=
2sin 24/sin 24=2
Ответ:2