sinπ/12+cosπ/12等于多少,不要具体值
问题描述:
sinπ/12+cosπ/12等于多少,不要具体值
答
sinπ/12+cosπ/12
=√2 sin(π/12+π/4)
=√2 sin(π/3)
=√2*(√3/2)
=√6/2