计算sin^2 (π/4)-cos^2 (π/4) * cosπ+3/4π^2 (π/6)+sin3π/2_数学解答

计算sin^2 (π/4)-cos^2 (π/4) * cosπ+3/4π^2 (π/6)+sin3π/2

人气：211 ℃　时间：2020-05-25 06:05:24

解答

sin^2 (π/4)-cos^2 (π/4) * cosπ+3/4cos^2 (π/6)+sin3π/2
=1/2-1/2*(-1)+3/4*3/4+(-1)
=9/16