1.sin的三次方(-α)cos(2π+α)tan(-α-π)2.cos(180°+α)sin(α+360°)/sin(-α-180°)cos(-180°-α)3.sin(2π-α)cos(π+α)cos(π/2+α)sin(9π/2+α)/cos(π-α)sin(3π-α)sin(-π-α)4.已知sinα=-3/5,求cosα,tanα的值5.已知tanα=-根号下3,求
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1.sin的三次方(-α)cos(2π+α)tan(-α-π)2.cos(180°+α)sin(α+360°)/sin(-α-180°)cos(-180°-α)3.sin(2π-α)cos(π+α)cos(π/2+α)sin(9π/2+α)/cos(π-α)sin(3π-α)sin(-π-α)4.已知sinα=-3/5,求cosα,tanα的值5.已知tanα=-根号下3,求
1.sin的三次方(-α)cos(2π+α)tan(-α-π)
2.cos(180°+α)sin(α+360°)/sin(-α-180°)cos(-180°-α)
3.sin(2π-α)cos(π+α)cos(π/2+α)sin(9π/2+α)/cos(π-α)sin(3π-α)sin(-π-α)
4.已知sinα=-3/5,求cosα,tanα的值
5.已知tanα=-根号下3,求sinα、cosα的值
1.sin的三次方(-α)cos(2π+α)tan(-α-π)2.cos(180°+α)sin(α+360°)/sin(-α-180°)cos(-180°-α)3.sin(2π-α)cos(π+α)cos(π/2+α)sin(9π/2+α)/cos(π-α)sin(3π-α)sin(-π-α)4.已知sinα=-3/5,求cosα,tanα的值5.已知tanα=-根号下3,求
1.sin的三次方(-α)cos(2π+α)tan(-α-π)
解-sin的三次方（α）乘cos（α）乘（-sinα/cosα)等于sin的四次方（α）
2.cos(180°+α)sin(α+360°)/sin(-α-180°)cos(-180°-α)
解cos(α)sin(α)/-sin(α)cos(α)等于1
3.sin(2π-α)cos(π+α)cos(π/2+α)sin(9π/2+α)/cos(π-α)sin(3π-α)sin(-π-α)
解-sin(α)-cos(α)-sin（α)-cos（α)/-cos（α)sin(α)-sin(α)等于-sin(α)
4.已知sinα=-3/5,求cosα,tanα的值
解sinα=-3/5,所以cosα=4/5 或者cosα=-4/5,所以tanα=sinα/cosα=3/4 或者-3/4
5.已知tanα=-根号下3,求sinα、cosα的值
解因为tanα=sinα/cosα 和sinα的平方加cosα的平方等于1可得sinα=-根号3/2,cosα=1/2 或者 sinα=根号3/2,cosα=-1/2
.已知sinα=-3/5，求cosα，tanα的值
已知sinα=-3/5，那么cosα=4/5 or cosα=-4/5,所以tanα=sinα/cosα=3/4 or -3/4
已知tanα=-根号下3，求sinα、cosα的值
用tanα=sinα/cosα与sinα的平方加cosα的平方等于1可解的sinα=-根号下3/2,cosα=1/2 or sinα=根号下3/2,cosα=-1/2