sina+cosa=根号3/3(0
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sina+cosa=根号3/3(0sina+cosa=根号3/3(0sina+cosa=根号3/3(0sina+cosa=根号3/3(0(sina+cosa)^2=1/31+2sinacosa=1/3
sina+cosa=根号3/3(0 sina+cosa=根号3/3(0 (sina+cosa)^2 = 1/3
sina+cosa=根号3/3(0
sina+cosa=根号3/3(0
1+2sinacosa = 1/3
sin2a=-2/3
cos2a = 正负的根号5 / 3
sina+cosa=根号3/3(0
cosa+根号3sina=
sinA+cosA=根号2/3,求sin2A/(sinA-cosA)
已知sina+cosa=根号3/2 求sina-cosa
根号(3sinA)+(根号2)cosA=0,A
若sina-3cosa=0,求值:(1)(根号3cosa-sina)/(根号3cosa+sina) (2)2sina的平方-3 sinacosa
sinA=根号3,COSA=?
化简sina-根号3cosa=
已知sina+cosa=(1-根号3)/2,(0
若sina+cosa=(1- 根号3)/2 (0
若sina+cosa=(1- 根号3)/2 (0
sina+cosa=(1-根号3)/2,且0
已知根号3sina+cosa=tana(0
sina+cosa=(1-根号3)/2,且0
sina/2+cosa/2=根号3/,且cosa
3sina=2cosa 则(cosa-sina/cosa+sina)+(cosa+sina/cosa-sina)=______
3sina=2cosa 则(cosa-sina/cosa+sina)+(cosa+sina/cosa-sina)=______
1.根号3cosa+sina 2.-sina+根号3cosa 3.cosa-根号sina