1.已知tanα=-1,则2sin²α-cos²α分之1+2sinα×cosα=2.cos750°×sin(-690°)=3.已知sinα+cosα=1/2,则sinα×cosα=4.已知sinα×cosα=1/8,且sinα>cosα,则cosα-sinα=5.sin210°= tan600°= 根号下1-sin²1190°= 6.若cos
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![1.已知tanα=-1,则2sin²α-cos²α分之1+2sinα×cosα=2.cos750°×sin(-690°)=3.已知sinα+cosα=1/2,则sinα×cosα=4.已知sinα×cosα=1/8,且sinα>cosα,则cosα-sinα=5.sin210°= tan600°= 根号下1-sin²1190°= 6.若cos](/uploads/image/z/7678313-17-3.jpg?t=1.%E5%B7%B2%E7%9F%A5tan%CE%B1%3D-1%2C%E5%88%992sin%26%23178%3B%CE%B1-cos%26%23178%3B%CE%B1%E5%88%86%E4%B9%8B1%2B2sin%CE%B1%C3%97cos%CE%B1%3D2.cos750%C2%B0%C3%97sin%EF%BC%88-690%C2%B0%EF%BC%89%3D3.%E5%B7%B2%E7%9F%A5sin%CE%B1%2Bcos%CE%B1%3D1%2F2%2C%E5%88%99sin%CE%B1%C3%97cos%CE%B1%3D4.%E5%B7%B2%E7%9F%A5sin%CE%B1%C3%97cos%CE%B1%3D1%2F8%2C%E4%B8%94sin%CE%B1%EF%BC%9Ecos%CE%B1%2C%E5%88%99cos%CE%B1-sin%CE%B1%3D5.sin210%C2%B0%3D+tan600%C2%B0%3D+%E6%A0%B9%E5%8F%B7%E4%B8%8B1-sin%26%23178%3B1190%C2%B0%3D+6.%E8%8B%A5cos)
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1.已知tanα=-1,则2sin²α-cos²α分之1+2sinα×cosα=2.cos750°×sin(-690°)=3.已知sinα+cosα=1/2,则sinα×cosα=4.已知sinα×cosα=1/8,且sinα>cosα,则cosα-sinα=5.sin210°= tan600°= 根号下1-sin²1190°= 6.若cos
1.已知tanα=-1,则2sin²α-cos²α分之1+2sinα×cosα=
2.cos750°×sin(-690°)=
3.已知sinα+cosα=1/2,则sinα×cosα=
4.已知sinα×cosα=1/8,且sinα>cosα,则cosα-sinα=
5.sin210°= tan600°= 根号下1-sin²1190°=
6.若cos(π+α)=-1/2,则cos(3π+α)=
7.若sin(-α-π)=1/3,则sin(9π+α)=
8.根号下1+tan²(-3π/6)-2tan(-43π/6)=
9.若cos(-100°)=a,则tan80°=
10.已知sin(π-α)=-2/3,α∈(-π/2,0),求tan(2π-α)的值
1.已知tanα=-1,则2sin²α-cos²α分之1+2sinα×cosα=2.cos750°×sin(-690°)=3.已知sinα+cosα=1/2,则sinα×cosα=4.已知sinα×cosα=1/8,且sinα>cosα,则cosα-sinα=5.sin210°= tan600°= 根号下1-sin²1190°= 6.若cos
很麻烦,这些只要对着诱导公式做就OK了,很简单
哇 你去找华罗庚帮你吧
汗死