共50条信息
设\(a=\sin 2\),\(b=\cos 2\),\(c=\tan 2\),则\(a\),\(b\),\(c\)的大小关系是( )
若\(α∈\left( \left. 0, \dfrac{π}{2} \right. \right)\),则\(\tan α > \sin α.(\) \()\)
若\(α\)为第一象限角,则\(\sin α+\cos α > 1.\)( )
.已知角\(α\)\(=\)\(2\)\(k\)\(π\)\(-\)\( \dfrac{π}{5} (\)\(k\)\(∈Z)\),若角\(θ\)与角\(α\)的终边相同,则\(y=\)\( \dfrac{\sin θ}{\left|\sin θ\right|}+ \dfrac{\cos θ}{\left|\cos θ\right|}+ \dfrac{\tan θ}{\left|\tan θ\right|} \)的值为\((\) \()\)
在\([0,2π]\)上,满足\(\sin x\geqslant \dfrac{1}{2}\)的\(x\)的取值范围是
已知\( \dfrac{11π}{6}\)的正弦线为\(MP\),正切线为\(AT\),则有( )
利用三角函数线,比较下列各组三角函数值的大小.
\((1)\sin \dfrac{2π}{3}\)与\(\sin \dfrac{4π}{5}\);
\((2)\tan \dfrac{2π}{3}\)与\(\tan \dfrac{4π}{5}\).
\(\sin x{ < }\dfrac{\sqrt{2}}{2}\)的\(x\)取值范围为______ .
进入组卷