1、已知两个非零向量a与b,定义丨a*b丨=丨a丨丨b丨sinθ,其中θ为a与b的夹角,若a=(-3,4)b=(0,2)则丨a*b丨=_______2、已知函数f(x)=asinx+bcosx的图像经过点(π/3,0)和(π/2,1),(1)求a和b的值,(2
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![1、已知两个非零向量a与b,定义丨a*b丨=丨a丨丨b丨sinθ,其中θ为a与b的夹角,若a=(-3,4)b=(0,2)则丨a*b丨=_______2、已知函数f(x)=asinx+bcosx的图像经过点(π/3,0)和(π/2,1),(1)求a和b的值,(2](/uploads/image/z/3911512-40-2.jpg?t=1%E3%80%81%E5%B7%B2%E7%9F%A5%E4%B8%A4%E4%B8%AA%E9%9D%9E%E9%9B%B6%E5%90%91%E9%87%8Fa%E4%B8%8Eb%2C%E5%AE%9A%E4%B9%89%E4%B8%A8a%2Ab%E4%B8%A8%3D%E4%B8%A8a%E4%B8%A8%E4%B8%A8b%E4%B8%A8sin%CE%B8%2C%E5%85%B6%E4%B8%AD%CE%B8%E4%B8%BAa%E4%B8%8Eb%E7%9A%84%E5%A4%B9%E8%A7%92%2C%E8%8B%A5a%3D%EF%BC%88-3%2C4%EF%BC%89b%3D%EF%BC%880%2C2%EF%BC%89%E5%88%99%E4%B8%A8a%2Ab%E4%B8%A8%3D_______2%E3%80%81%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3Dasinx%2Bbcosx%E7%9A%84%E5%9B%BE%E5%83%8F%E7%BB%8F%E8%BF%87%E7%82%B9%EF%BC%88%CF%80%2F3%2C0%EF%BC%89%E5%92%8C%EF%BC%88%CF%80%2F2%2C1%EF%BC%89%2C%EF%BC%881%EF%BC%89%E6%B1%82a%E5%92%8Cb%E7%9A%84%E5%80%BC%2C%EF%BC%882)
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