cos²α=1/2(1+cos2α)sin²α=1/2(1-cos2α) √（5/4cos²α+3/2sin²α+√3/4 sin2α）=√[5/4*1/2(1+cos2α)+3/2*1/2(1-cos2α)+√3/4sin2α]=√[5/8cos2α-3/4cos2α+11/8+√3/4sin2α]=√[√3/...