sin(x)+cos(x)=23 根號2倍(sin(2x-π4)+1)1+tan(x)=?2sin(x)*cos(x)+2sin(x)^2)(1+tan(x))=2sin(x)*cos(x)怎麽來的。
sin(x) cos(x)=2/3 根號2倍(sin(2x-π/4) 1)/1 tan(x)=?
2sin(x)*cos(x) 2sin(x)^2)/(1 tan(x))
=2sin(x)*cos(x)
怎麽來的。
2sin(x)*cos(x) 2sin(x)^2)/(1 tan(x))
=2sin(x)*cos(x)
怎麽來的。
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