共50条信息
已知角\(α\)的终边经过点\(P(3,-4)\),则\(\sin α+\cos α\)的值为__________.
若\(θ\)满足\(\sin θ < 0\),\(\cos θ > 0\),则\(θ\)的终边在( )
若角\(α\)的终边经过点\(P_{0}(-3,-4)\),则\(\tan α=\) \((\) \()\)
已知角\(α\)的终边与单位圆\(x^{2}+y^{2}=1\)交于\(P\left( \left. \dfrac{1}{2},y_{0} \right. \right)\),则\(\sin \left( \left. \dfrac{π}{2}+2α \right. \right)=(\) \()\)
\(α\)是第二象限角,\(P(- \sqrt{3},y)\)为其终边上一点,且\(\cos α=- \dfrac{ \sqrt{15}}{5}\),则\(\sin α\)的值为( )
设角\(\theta \)的终边过点\(\left( 1,\ 2 \right)\),则\(\tan \left( \theta -\dfrac{{ }\!\!\pi\!\!{ }}{4} \right)=(\) \()\)
在平面直角坐标系\(xOy\)中,已知单位圆\(O\)与\(x\)轴正半轴交于点\(A\),\(P(\cos 2,-\sin 2) \)为圆上一点,则劣弧\( \overset{⌢}{AP} \)的弧长为_______.
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