请问这两题怎么做
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![请问这两题怎么做](/uploads/image/z/5895623-47-3.jpg?t=%E8%AF%B7%E9%97%AE%E8%BF%99%E4%B8%A4%E9%A2%98%E6%80%8E%E4%B9%88%E5%81%9A)
请问这两题怎么做
请问这两题怎么做
请问这两题怎么做
2、f(x)=sinxcosx+cos²x
=1/2sin2x+1/2cos2x+1/2
=√2/2sin(2x+π/4)+1/2
T=2π/2=π
∵0≤x≤π/2∴π/4≤2x+π/4≤5π/4
2x+π/4=π/2,f(x)max=(1+√2)/2
2x+π/4=5π/4,f(x)max=(1-√2)/2