Independent variable is basically x and dependent is y. Independent relies on itself and is always first while on the other hand dependent depends on the independent
Answer: ![\cos^{-1} \left(\frac{-37}{\sqrt{7298}} \right) \approx 115.665^{\circ}](https://tex.z-dn.net/?f=%5Ccos%5E%7B-1%7D%20%5Cleft%28%5Cfrac%7B-37%7D%7B%5Csqrt%7B7298%7D%7D%20%5Cright%29%20%5Capprox%20115.665%5E%7B%5Ccirc%7D)
Step-by-step explanation:
![u \cdot v=(1)(8)+(-9)(5)=-37\\\\|u|=\sqrt{1^{2}+(-9)^{2}}=\sqrt{82}\\\\|v|=\sqrt{8^{2}+5^{2}}=\sqrt{89}\\\\\cos \theta=\frac{-37}{\sqrt{82}\sqrt{89}}\\\\\theta=\cos^{-1} \left(\frac{-37}{\sqrt{82}\sqrt{89}} \right)\\\\\theta=\boxed{\cos^{-1} \left(\frac{-37}{\sqrt{7298}} \right) \approx 115.665^{\circ}}](https://tex.z-dn.net/?f=u%20%5Ccdot%20v%3D%281%29%288%29%2B%28-9%29%285%29%3D-37%5C%5C%5C%5C%7Cu%7C%3D%5Csqrt%7B1%5E%7B2%7D%2B%28-9%29%5E%7B2%7D%7D%3D%5Csqrt%7B82%7D%5C%5C%5C%5C%7Cv%7C%3D%5Csqrt%7B8%5E%7B2%7D%2B5%5E%7B2%7D%7D%3D%5Csqrt%7B89%7D%5C%5C%5C%5C%5Ccos%20%5Ctheta%3D%5Cfrac%7B-37%7D%7B%5Csqrt%7B82%7D%5Csqrt%7B89%7D%7D%5C%5C%5C%5C%5Ctheta%3D%5Ccos%5E%7B-1%7D%20%5Cleft%28%5Cfrac%7B-37%7D%7B%5Csqrt%7B82%7D%5Csqrt%7B89%7D%7D%20%5Cright%29%5C%5C%5C%5C%5Ctheta%3D%5Cboxed%7B%5Ccos%5E%7B-1%7D%20%5Cleft%28%5Cfrac%7B-37%7D%7B%5Csqrt%7B7298%7D%7D%20%5Cright%29%20%5Capprox%20115.665%5E%7B%5Ccirc%7D%7D)
I think it is D
Hope my answer help you?!
Answer:1
Step-by-step explanation: