已知SINA-2COSA=0,求SIN^2A-.已知SINA-2COSA=0,求:2SIN^2 A - 3COS^2 A-------------------- = 4SIN^2 A - 9COS^2 A那个分母线画得太短了应该是:2SIN^2 A - 3COS^2 A -------------------------------- = 4SIN^2 A - 9COS^2 A
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/24 16:22:47
![已知SINA-2COSA=0,求SIN^2A-.已知SINA-2COSA=0,求:2SIN^2 A - 3COS^2 A-------------------- = 4SIN^2 A - 9COS^2 A那个分母线画得太短了应该是:2SIN^2 A - 3COS^2 A -------------------------------- = 4SIN^2 A - 9COS^2 A](/uploads/image/z/2667546-18-6.jpg?t=%E5%B7%B2%E7%9F%A5SINA-2COSA%3D0%2C%E6%B1%82SIN%5E2A-.%E5%B7%B2%E7%9F%A5SINA-2COSA%3D0%2C%E6%B1%82%3A2SIN%5E2+A+-+3COS%5E2+A--------------------+%3D+4SIN%5E2+A+-+9COS%5E2+A%E9%82%A3%E4%B8%AA%E5%88%86%E6%AF%8D%E7%BA%BF%E7%94%BB%E5%BE%97%E5%A4%AA%E7%9F%AD%E4%BA%86%E5%BA%94%E8%AF%A5%E6%98%AF%3A2SIN%5E2+A+-+3COS%5E2+A+--------------------------------+%3D+4SIN%5E2+A+-+9COS%5E2+A)
已知SINA-2COSA=0,求SIN^2A-.已知SINA-2COSA=0,求:2SIN^2 A - 3COS^2 A-------------------- = 4SIN^2 A - 9COS^2 A那个分母线画得太短了应该是:2SIN^2 A - 3COS^2 A -------------------------------- = 4SIN^2 A - 9COS^2 A
已知SINA-2COSA=0,求SIN^2A-.
已知SINA-2COSA=0,求:
2SIN^2 A - 3COS^2 A
-------------------- =
4SIN^2 A - 9COS^2 A
那个分母线画得太短了
应该是:
2SIN^2 A - 3COS^2 A
-------------------------------- =
4SIN^2 A - 9COS^2 A
已知SINA-2COSA=0,求SIN^2A-.已知SINA-2COSA=0,求:2SIN^2 A - 3COS^2 A-------------------- = 4SIN^2 A - 9COS^2 A那个分母线画得太短了应该是:2SIN^2 A - 3COS^2 A -------------------------------- = 4SIN^2 A - 9COS^2 A
上下除以cos^2A
已知,5sina+2cosa=0,求sina*cosa
1:已知sina+cosa=根2求sina cosa sin(4方)a+cos(4方)的值2:已知:sina+cosa=1/5(0
已知sina-2cosa=0求sina-3cosa/sina+3cosa求sin²a+sinacosa+3
已知sinα=2cosα,求sina+5cosa/-2cosa+sinasina+5cosa/-2cosa+sina
已知tana=-3,求sina+2cosa/cosa-3sina和sin^2a-sinacosa
已知sina+2cosa=0 求sina+cosa/sina-cosa
已知tana=3,求下列各式的值 1.sina+cosa/sina-cosa 2.sina.cosa 3.sin^2 a+sina.cosa
已知sina-2cosa=0,求sin^2a+sinacosa+3的值 已知sina-2cosa=0,求sin^2a+sinacosa+3的值
已知(sina+cosa)/(sina-cosa)=3 则2sin'a+(sina-cosa)'=?
已知sin(pai-a)-2cosa=0若sina
已知2ina+3cosa=0,求(cosa-sina)/(cosa+sina)+(cosa+sina)/(cosa-sina)的值.已知2ina+3cosa=0,求①(cosa-sina)/(cosa+sina)+(cosa+sina)/(cosa-sina)②(sina-cosa)(sina+2cosa)的值.
已知sina+cosa=0,求sin^2a+2sinacosa+cos^2a
已知sinA+cosA=m求sinA-cosa(0°
已知12sina+5cosa=0,求sina,cosa
已知sinA+cosA=根号2、求sinA-cosA=?
已知sina-cosa=-2cos2a求sina+cosa=?
已知tanA=2求3sinA-cosA/sinA+cosA
已知sina=-2cosa求sina 和 cosa