What does n even equal to

Which statement about the relative areas of δabc and δxyz is true? the area of δabc > the area of δxyz the area of δabc < the area of δxyz the area of δabc = the area of δxyz more information is needed to compare.

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)