已知M(a,b),N(sinωx,cosωx)(ω>0),记f(x)=
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(O为坐标原点).若f(x)的最小正周期为2,并且当x=
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时,f(x)的最大值为5.
(1)求函数f(x)的表达式;
(2)对任意的整数n,在区间(n,n+1)内是否存在曲线y=f(x)的对称轴?若存在,求出此对称轴方程;若不存在,说明理由.
考点分析:
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时,恒有ax+by≤1,则以a、b为坐标的点P(a,b)所形成的平面区域的面积等于
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已知函数f(x)=|x
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①f(x)必是偶函数;
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其中所有真命题的序号是
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直三棱柱ABC-A
1B
1C1的底面ABC为等腰直角三角形,斜边AB=
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A.2π
B.3π
C.4π
D.5π
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点P(-3,1)在椭圆
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=(2,-5)的光线,经直线y=-2反射后通过椭圆的左焦点,则这个椭圆的离心率为( )
A.
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B.
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C.
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D.
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已知向量a=(
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,则向量a与i的夹角<a,i>=( )
A.
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B.-
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C.
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D.
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