tan2Θ=-2√2,π
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/01 11:38:35
xJ@_edRoyB%AŃ"xPыx+# ݠo쟖hx}vv22K)֕^\b(E7Y"aqg/S,i]\PWl1T@-py{t1ҏ3}6&
tan2Θ=-2√2,π
tan2Θ=-2√2,π
tan2Θ=-2√2,π
2cos^2Θ/2-sinΘ-1 / √2sin(Θ+π/4) =(cosΘ-sinΘ) /(cosΘ+sinΘ) {在分子和分母上同时除以cosΘ}
=(1-tanΘ) / (1+tanΘ)
tan2Θ=-2√2 =2tanΘ / (1-tan^2 Θ) 解得 tanΘ =√2或-√2/2
tanΘ =√2时 原式 = 2√2 -3
tanΘ =-√2/2时 原式 = 3 + 2√2
cosπ/12 x cos5π/12=1/2(cos(π/12+5π/12)+cos(π/12-5π/12))
=1/2(cos(π/2+cos(-π/3))
=1/2cosπ/3
=1/4
cosπ/12 x cos5π/12
=1/2(cos(π/12+5π/12)+cos(π/12-5π/12))
=1/2(cos(π/2+cos(-π/3))
=1/2cosπ/3
=1/2*1/2=1/4
tan2Θ=-2√2,π
若tan2θ=-2√2,π/2
若tan2θ=-2√2,π/2
tan2Θ=-2√2,π/4
已知tan2θ=2√2,且0
已知tan2θ=3/4(π/2
已知tan2θ=3/4(π/2
为什么tan2=tan(2-π)tan2=tan(2+π),但为什么tan2=tan(2-π)
求证(tanαtan2α/tan2α-tanα)+√3[(sinα)^2-(cosα)^2]=2sin(2α-π/3)
证明:tanθ-(1/tanθ)=-2/tan2θ
已知tan2α=-2根号2,π/2
已知tanx=2,则tan2(x-π/4)=?
tan2/x=2,求tanx=?
证明sina=1+tan2分之2α分之2tan2分之α
tan2α+1/tan2α=2 则sinαcosα=
sin2αtan2α=tan2α-sin2α 2是平方最简单的方法
求证tan2分之α-1/tan2分之α=-tanα分之2
已知tan2θ=3/4(π/2<θ<π),求(2cos^2θ/2+sinθ+10/[√2cos(θ+π/4]