sin(2a+π/4)化简成tan
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sin(2a+π/4)化简成tan
sin(2a+π/4)化简成tan
sin(2a+π/4)化简成tan
sin(2a+π/4)
=sin2acosπ/4+cos2asinπ/4
=√2/2(sin2a+cos2a)
=√2/2[2tana/(1+tan²a)+(1-tan²a)/(1+tan²a)]
=√2/2[(2tana+1-tan²a)/(1+tan²a) ]
sin(2a+π/4)化简成tan
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