△abc AB=根号2AC∠B=30 ° 则∠A
问题描述:
△abc AB=根号2AC∠B=30 ° 则∠A
答
AB/sinC=AC/sinB
根号2AC/sinC=AC/sin30 °
sinC=根号2/2
∠C=45°
∠A=105°