cos^4 x-sin^4 x+2 sin^2 x化简
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cos^4x-sin^4x+2sin^2x化简cos^4x-sin^4x+2sin^2x化简cos^4x-sin^4x+2sin^2x化简cos^4x-sin^4x+2sin^2x=(cos²
cos^4 x-sin^4 x+2 sin^2 x化简
cos^4 x-sin^4 x+2 sin^2 x化简
cos^4 x-sin^4 x+2 sin^2 x化简
cos^4 x-sin^4 x+2 sin^2 x
=(cos²x+sin²x)(cos²x-sin²x)+2sin² x
=cos²x-sin²x+2sin² x
=cos²x+sin²x
=1
化简sin^4x-sin^2x+cos^2x
化简:sin^4 x-sin^2 x+cos^2 x
化简sin^4x+cos^2x
化简(sin^2x-cos^4x+cos^2x-sin^4x)/(sin^2x-cos^6x+cos^2x-sin^6x)
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化简cos^4x+sin^4x