SOS!高一数学题sin15sin30sin45sin60sin75
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SOS!高一数学题sin15sin30sin45sin60sin75
SOS sin15sin30sin45sin60sin75=?
SOS sin15sin30sin45sin60sin75=?
![SOS!高一数学题sin15sin30sin45sin60sin75](/uploads/image/z/17595021-21-1.jpg?t=SOS%21%E9%AB%98%E4%B8%80%E6%95%B0%E5%AD%A6%E9%A2%98sin15sin30sin45sin60sin75)
原式=(sin15sin75)sin30sin45sin60
=(sin15cos15)*1/2*√2/2*√3/2
=1/2*sin30*√6/8
=√6/32
=(sin15cos15)*1/2*√2/2*√3/2
=1/2*sin30*√6/8
=√6/32