(1)已知角α终边经过点P(-4,3)
求[cos(π/2+α)sin(-π-α)]/cos(11π/2-α)sin(9π/2+α)的值.(2)已知函数y=a-bcos(x-π/3),(b>0)在0≤x≤π的最...
求[cos(π/2+α)sin(-π-α)]/cos(11π/2-α)sin(9π/2+α)的值.
(2)已知函数y=a-bcos(x-π/3),(b>0)在0≤x≤π的最大值为3/2,最小值为-1/2,求2a+b的值. 展开
(2)已知函数y=a-bcos(x-π/3),(b>0)在0≤x≤π的最大值为3/2,最小值为-1/2,求2a+b的值. 展开
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