优优班--学霸训练营 > 知识点挑题
全部资源
          排序:
          最新 浏览

          50条信息

            • 1.
              已知\(\sin α= \dfrac {3}{5}\),且\(α\)为第二象限角.
              \((1)\)求\(\sin 2α\)的值;
              \((2)\)求\(\tan (α+ \dfrac {π}{4})\)的值.
            • 2.
              若\(\sin ( \dfrac {π}{6}-α)= \dfrac {1}{3}\),则\(\cos ^{2}( \dfrac {π}{6}+ \dfrac {α}{2})=\) ______ .
            • 3.
              已知函数\(f(x)=2a\sin ωx\cos ωx+2 \sqrt {3}\cos ^{2}ωx- \sqrt {3}(a > 0,ω > 0)\)的最大值为\(2\),且最小正周期为\(π\).
              \((I)\)求函数\(f(x)\)的解析式及其对称轴方程;
              \((II)\)若\(f(α)= \dfrac {4}{3}\),求\(\sin (4α+ \dfrac {π}{6})\)的值.
            • 4.
              若\(0 < α < \dfrac {π}{2}\),\(0 < β < \dfrac {π}{2}\),\(\sin ( \dfrac {π}{3}-α)= \dfrac {3}{5}\),\(\cos ( \dfrac {β}{2}- \dfrac {π}{3})= \dfrac {2 \sqrt {5}}{5}\).
              \((I)\)求\(\sin α\)的值;
              \((II)\)求\(\cos ( \dfrac {β}{2}-α)\)的值.
            • 5.
              已知\(\sin θ-3\cos θ= \sqrt {10}\),则\(\tan (θ- \dfrac {π}{4})=\)______.
            • 6.
              已知锐角\(α\),\(β\)满足\((\tan α-1)(\tan β-1)=2\),则\(α+β\)的值为 ______ .
            • 7.
              已知\(\sin ( \dfrac {π}{3}-x)= \dfrac {3}{5}\),且\(x\)为第二象限角,则\(\cos (x+ \dfrac {π}{6})=\) ______ .
            • 8.
              已知\(\cos α+\cos β= \dfrac {1}{2},\sin α+\sin β= \dfrac {1}{3}\),则\(\cos (α-β)=(\)  \()\)
              A.\( \dfrac {13}{72}\)
              B.\(- \dfrac {59}{72}\)
              C.\( \dfrac {1}{6}\)
              D.\(1\)
            • 9.
              已知\(\sin α= \dfrac {4}{5}\),\( \dfrac {π}{2} < α < π\),则\(\cos (α- \dfrac {π}{4})=\) ______ .
            • 10.
              设函数\(f(x)= \sqrt {3}\cos (2x+φ)+\sin (2x+φ)(|φ| < \dfrac {π}{2})\),且图象关于直线\(x=0\)对称,则\((\)  \()\)
              A.\(y=f(x)\)的最小正周期为\(π\),且在\((0, \dfrac {π}{2})\)上为增函数
              B.\(y=f(x)\)的最小正周期为\(π\),且在\((0, \dfrac {π}{2})\)上为减函数
              C.\(y=f(x)\)的最小正周期为\( \dfrac {π}{2}\),且在\((0, \dfrac {π}{4})\)上为增函数
              D.\(y=f(x)\)的最小正周期为\( \dfrac {π}{2}\),且在\((0, \dfrac {π}{4})\)上为减函数
            0/40

            进入组卷