2cos2x+2sin2x怎么化简
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2cos2x+2sin2x怎么化简2cos2x+2sin2x怎么化简2cos2x+2sin2x怎么化简2cos2x+2sin2x=2√2(sin2x(√2/2)+cos2x(√2/2))=2√2(si
2cos2x+2sin2x怎么化简
2cos2x+2sin2x怎么化简
2cos2x+2sin2x怎么化简
2cos2x+2sin2x
=2√2(sin2x (√2/2) + cos2x (√2/2) )
=2√2(sin2xcosπ/4 + cos2xsinπ/4)
=2√2sin(2x+π/4)
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