化简√(2+cos2+sin^2 1)
化简(sinα-cosα)^2-1/-cos2α
化简:sin^2αsin^2β+cos^2αcos^2β-1/2cos2αcos2β
化简(sinα)^2*(sinβ)^2+(cosα)^2(cosβ)^2-1/2cos2αcos2β
化简sinα^2sinβ^2+cos^2cosβ^2-1/2cos2αcos2β
化简:sin²αsin²β+cos²αcos²β-1/2cos2αcos2β
化简:sin²αsin²β+cos²αcos²β—1/2cos2αcos2β
化简 sin²αsin²β+cos²αcos²β-1/2(cos2αcos2β)
化简sin²α·sin²β+cos²αcos²β-1/2cos2α·cos2β
化简:sin²αsin²в+cos²αcos²в-1/2cos2αcos2в
化解sin^2αsin^2β+cos^2αcos^2β-1/2cos2αcos2β
Sin²αSin²β+Cos²αCos²β-1/2Cos2αCos2β
sin²α*sin²β+cos²α*cos²β-1/2cos2αcos2β