sin(2x+ π/3)乘cos(2x+π/3)等于
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sin(2x+π/3)乘cos(2x+π/3)等于sin(2x+π/3)乘cos(2x+π/3)等于sin(2x+π/3)乘cos(2x+π/3)等于sin(2x+π/3)*cos(2x+π/3)=(
sin(2x+ π/3)乘cos(2x+π/3)等于
sin(2x+ π/3)乘cos(2x+π/3)等于
sin(2x+ π/3)乘cos(2x+π/3)等于
sin(2x+ π/3)*cos(2x+π/3)=(1/2)sin2*(2x+ π/3)
=(1/2)sin(4x+ 2π/3)
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sin(2x+ π/3)乘cos(2x+π/3)等于
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