已知sin(2x+π/6)=3/5 求cos2x π/4

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已知sin(2x+π/6)=3/5求cos2xπ/4已知sin(2x+π/6)=3/5求cos2xπ/4已知sin(2x+π/6)=3/5求cos2xπ/4因为π/41

已知sin(2x+π/6)=3/5 求cos2x π/4
已知sin(2x+π/6)=3/5 求cos2x π/4

已知sin(2x+π/6)=3/5 求cos2x π/4
因为 π/4

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