共50条信息
已知函数\(f(x)=\sqrt{3}\sin (2x-\dfrac{\pi }{6})+2{{\sin }^{2}}(x-\dfrac{\pi }{12})(x\in R).\)
\((1)\)求函数\(f(x)\)的最小正周期;
\((2)\)求\(f(x)\)的单调增区间;
\((3)\) 若\(x\in [0,2\pi ]\)时,求函数\(f(x)\)的零点.
若角\(\alpha{∈}({-}\pi{,}{-}\dfrac{\pi}{2})\),则\(\sqrt{\dfrac{1{+}\cos\alpha}{1{-}\cos\alpha}}{-}\sqrt{\dfrac{1{-}\cos\alpha}{1{+}\cos\alpha}}{=}({ })\)
下列函数中,是周期函数且最小正周期为\(π\)的是( )
在\(\triangle ABC\)中,\(∠A=60^{\circ}\),\(c=\)\(a.\)
\((1)\)求\(\sin C\)的值;
\((2)\)若\(a=7\),求\(\triangle ABC\)的面积.
进入组卷