3.
\((1)\)设向量\(\overrightarrow{a}=\left(33\right) \),\(\overrightarrow{b}\left(1,-1\right) \),若\(\left( \overrightarrow{a}+λ \overrightarrow{b}\right)⊥\left( \overrightarrow{a}-λ \overrightarrow{b}\right) \),则实数\(λ=\)________.
\((2)\)如图,菱形\(ABCD\)的边长为\(2\),\(∠A=60^{\circ}\),\(M\)为\(DC\)的中点,则\(\overrightarrow{AM}\cdot \overrightarrow{AB}\)的值为________.
\((3)\)如果\(\tan α\),\(\tan β\)是方程\(x^{2}-3x-3=0\)的两根,则\(\dfrac{\sin (\alpha +\beta )}{\cos (\alpha -\beta )}=\)________.
\((4)\)将函数\(f(x)=\sin 2x\)的图像向右平移\(\varphi (0 < \varphi < \dfrac{\pi }{2})\)个单位后得到函数\(g(x)\)的图像\(.\)若对满足\(|f(x_{1})-g(x_{2})|=2\)的\(x_{1}\),\(x_{2}\),有\(|{{x}_{1}}-{{x}_{2}}{{|}_{\min }}=\dfrac{\pi }{3}\),则\(φ=\)________.
\((5)\)若方程\(\cos ^{2}x-\sin x+a=0\),在\((0,\dfrac{\pi }{2}]\)内有解,则\(a\)的取值范围是________.