Which expressions can be used to find m∠ABC? Check all that apply. cos−1 cos−1 cos−1 sin−1 sin−1 sin−1

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Find the value of x. give reasons to justify your solutions! l, m ∈ kn