化简求sin^2(a-π/3)+sin^2(a+π

化简求sin^2(a-π/3)+sin^2(a+π/3)+sin^2a

1个回答

sin^2(a-π/3)+sin^2(a+π/3)+sin^2a
=1/2-cos(2a-2π/3)/2+1/2-cos(2a+2π/3)/2+1/2-cos2a/2
=3/2

化简sin^2A+sin^(A-π/3)+sin(A+π/3)
化简sin²(a-π/2)/cos(a-3π)sin(3π/2+a)
化简:√(1+2sin(3π-a)cos(a-3π)/[sin(a-3π/2)-√(1-sin^2(5π/2+a))]
化简 sin(2π-a)sin(π+a)cos-π-a) / sin(3π-a)cos(π-a)
化简sin(a+3π/2)sin(3π/2-a)tan^2(2π-a)tan(π-a)/cos(π/2-a)cos(π/
化简:sin(a+5π)cos(-π/2-a)·cos(8π-a)/sin(a-3π)·sin(-a-4π)
化简sin2(a-π/6)+sin2(a+π/6)-sin2a
sin²（a+π)cos(π+a)sin(-a-2π)/sin(π-a)cos³(-a-π) 化简
化简:sin(-a)cos(2π+a)sin(-a-π)
【1】化简：sin(a-5π）/cos(3π-a）×cos(π/2-a）/sin(a-3π）×cos(8π-a）/sin