Degree of 4, zeros: -2-5i, 3 multiplicity 2

Can someone me with these two circle theorem questions asap?

Find all the angles that satisfy the equation cos(θ)=32

Arectangular lawn is 65 m long and 34 m wide. over time, people have walked along a diagonal as a shortcut and have created a straight path. what is the length of the path, to the nearest tenth of a meter? enter your answer as a deicmal in the box. m