等比数列{an}满足:a2+a6=34π/3,a2·a6=64π/9,则sin(a4)=

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/26 21:42:14
等比数列{an}满足:a2+a6=34π/3,a2·a6=64π/9,则sin(a4)=等比数列{an}满足:a2+a6=34π/3,a2·a6=64π/9,则sin(a4)=等比数列{an}满足:a

等比数列{an}满足:a2+a6=34π/3,a2·a6=64π/9,则sin(a4)=
等比数列{an}满足:a2+a6=34π/3,a2·a6=64π/9,则sin(a4)=

等比数列{an}满足:a2+a6=34π/3,a2·a6=64π/9,则sin(a4)=
数列{an}是等比数列,则:
a2×a6=(a4)²
则:
(a4)²=64π/9
a4=±8π/3
则:
sin(a4)=sin(±8π/3)=±√3/2