共50条信息
设函数\(f(x)=2\sqrt{3}\sin \dfrac{x}{3}\cos \dfrac{x}{3}-2{{\sin }^{2}}\dfrac{x}{3}\)
\((\)Ⅰ\()\)若\(x\in [0,\pi ]\),求函数\(f(x)\)的值域;
\((\)Ⅱ\()\)在\(\Delta ABC\)中,角\(A,B,C\)的对边分别是\(a,b,c\),若\(f(C)=1\)且\({{b}^{2}}=ac\),求\(\sin A\) 的值.
已知\(\sin \left( \dfrac{π}{4}-x\right)= \dfrac{3}{5} \),则\(\sin 2x \)的值为________
已知函数\(f(x)= \dfrac{1}{2}\sin 2x\sin φ+{\cos }^{2}x\cos φ+ \dfrac{1}{2}\sin ( \dfrac{3π}{2}-φ)(0 < φ < π) \),其图象过点\(( \dfrac{π}{6}, \dfrac{1}{2}) \) .
\((\)Ⅰ\()\)求函数\(f(x)\)在\([0,π]\)上的单调递减区间;
\((\)Ⅱ\()\)若\({x}_{0}∈( \dfrac{π}{2},π) \),\(\sin {x}_{0}= \dfrac{3}{5} \),求\(f({x}_{0}) \)的值.
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