急.设函数f(x)=cos(2x+π/3)+sin^2 X求:(1)求函数f(x)的最大值和最小正周期 (2)设A,B,C为三角形ABC的三个内角,若cosB=1/3,f(c/2)=-1/4,且C为锐角,求sinA
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![急.设函数f(x)=cos(2x+π/3)+sin^2 X求:(1)求函数f(x)的最大值和最小正周期 (2)设A,B,C为三角形ABC的三个内角,若cosB=1/3,f(c/2)=-1/4,且C为锐角,求sinA](/uploads/image/z/1988599-31-9.jpg?t=%E6%80%A5.%E8%AE%BE%E5%87%BD%E6%95%B0f%28x%29%3Dcos%282x%2B%CF%80%2F3%29%2Bsin%5E2+X%E6%B1%82%EF%BC%9A%281%29%E6%B1%82%E5%87%BD%E6%95%B0f%28x%29%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E5%92%8C%E6%9C%80%E5%B0%8F%E6%AD%A3%E5%91%A8%E6%9C%9F++++%EF%BC%882%EF%BC%89%E8%AE%BEA%2CB%2CC%E4%B8%BA%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E4%B8%89%E4%B8%AA%E5%86%85%E8%A7%92%2C%E8%8B%A5cosB%3D1%2F3%2Cf%28c%2F2%29%3D-1%2F4%2C%E4%B8%94C%E4%B8%BA%E9%94%90%E8%A7%92%2C%E6%B1%82sinA)
急.设函数f(x)=cos(2x+π/3)+sin^2 X求:(1)求函数f(x)的最大值和最小正周期 (2)设A,B,C为三角形ABC的三个内角,若cosB=1/3,f(c/2)=-1/4,且C为锐角,求sinA
急.设函数f(x)=cos(2x+π/3)+sin^2 X
求:(1)求函数f(x)的最大值和最小正周期
(2)设A,B,C为三角形ABC的三个内角,若cosB=1/3,f(c/2)=-1/4,且C为锐角,求sinA
急.设函数f(x)=cos(2x+π/3)+sin^2 X求:(1)求函数f(x)的最大值和最小正周期 (2)设A,B,C为三角形ABC的三个内角,若cosB=1/3,f(c/2)=-1/4,且C为锐角,求sinA
原式=1/2+根3/2sin2X
1)求函数f(x)的最大值1/2+根3/2,最小正周期π