1+2cos^α-cos2α怎么化简?
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1+2cos^α-cos2α怎么化简?1+2cos^α-cos2α怎么化简?1+2cos^α-cos2α怎么化简?1+2cos^α-cos2α=1+2cos^α-(2cos^α-1)=21+2cos^
1+2cos^α-cos2α怎么化简?
1+2cos^α-cos2α怎么化简?
1+2cos^α-cos2α怎么化简?
1+2cos^α-cos2α
=1+2cos^α-(2cos^α-1)
=2
1+2cos^α-cos2α=1+2cos^α-2cos^α+1=2
1+2cos^α-cos2α=1+2cos^α-cos^α+sin^α
=1+cos^α+sin^α
=1+1=2
1+2cos^α-cos2α怎么化简?
sin²α*sin²β+cos²α*cos²β-1/2cos2αcos2β=(1-cos2α)/2*(1-cos2β)/2+(1+cos2α)/2*(1+cos2β)/2-1/2cos2α*cos2β=1/4(1+cos2α*cos2β-cos2α-cos2β)+1/4(1+cos2α*cos2β+cos2α+cos2β)-1/2cos2α*cos2β=1/4+1/
(2sin2α/1+cos2α)*(cosα)^2/cos2α=?
(2sin2α/1+cos2α)*(cosα)^2/cos2α=多少
化简 [2sin2α/(1+cos2α)]*[cos^2α/cos2α]
(2sin2α/1+cos2α)*(cos^2/cos2α)=?
化简(sinα-cosα)^2-1/-cos2α
sinα-cosα=1/2 求cos2α
根号下1减sin(π+2)cos(π+2)化简是多少啊A sin2-cos2 B cos2-sin2 C +-(sin2-cos2) D sin2+cos2
化简(sinα)^2*(sinβ)^2+(cosα)^2(cosβ)^2-1/2cos2αcos2β
化简:sin^2αsin^2β+cos^2αcos^2β-1/2cos2αcos2β
化解sin^2αsin^2β+cos^2αcos^2β-1/2cos2αcos2β
化简:sin²αsin²β+cos²αcos²β-1/2cos2αcos2β
化简 sin²αsin²β+cos²αcos²β-1/2(cos2αcos2β)
sin²αsin²β+cos²αcos²β-【(1/2)*cos2αcos2β】
化简:sin²αsin²β+cos²αcos²β—1/2cos2αcos2β
化简sinα^2sinβ^2+cos^2cosβ^2-1/2cos2αcos2β
[sin4α/(1+cos4α)]×[cos2α/(1+cos2α)]×[cosα/(1+cosα)]=?