高中数学!要求有过程!求a4sin60sin(a)=sin45
2019-04-19
高中数学!要求有过程!
求a
4sin60sin(a)=sin45
优质解答
4sin60sin(a)=sin45
4×√3×0.5×sinA=√2/2
sinA=√6/12
A=arcsin(√6/12)+2kπ或A=-arcsin(√6/12)+(2k+1)π,(k∈Z)
4sin60sin(a)=sin45
4×√3×0.5×sinA=√2/2
sinA=√6/12
A=arcsin(√6/12)+2kπ或A=-arcsin(√6/12)+(2k+1)π,(k∈Z)