(a+b+c)/(sinA+sinB+sinC)等于a/sinA+bsinB+csinC?是么

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(a+b+c)/(sinA+sinB+sinC)等于a/sinA+bsinB+csinC?是么
(a+b+c)/(sinA+sinB+sinC)等于a/sinA+bsinB+csinC?是么

(a+b+c)/(sinA+sinB+sinC)等于a/sinA+bsinB+csinC?是么