化简sin2(α+π/4)-sin2(π/4-α)如题

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化简sin2(α+π/4)-sin2(π/4-α)如题化简sin2(α+π/4)-sin2(π/4-α)如题化简sin2(α+π/4)-sin2(π/4-α)如题解sin2(α+π/4)-sin2(π

化简sin2(α+π/4)-sin2(π/4-α)如题
化简sin2(α+π/4)-sin2(π/4-α)
如题

化简sin2(α+π/4)-sin2(π/4-α)如题
解sin2(α+π/4)-sin2(π/4-α)
=sin(2α+π/2)-sin(π/2-2α)
=cos2α-cos2α
=0