sin45:sin60:sin75

SOS!高一数学题sin15sin30sin45sin60sin75 SOS sin15sin30sin45sin60sin75=?
2025-06-28 22:47:46
推荐回答(1个)
回答1:

原式=(sin15sin75)sin30sin45sin60
=(sin15cos15)*1/2*√2/2*√3/2
=1/2*sin30*√6/8
=√6/32