How do you divide 12 divided by 0.02?

Does anyone know how to do geometryme with this problem

What is the missing statement in step 4? ? rts ? ? vtu and ? rtu ? ? vts ? rts ? ? rvs and ? rtu ? ? stv ? vrs ? ? vru and ? usr ? ? usv ? vur ? ? vus and ? uvs ? ? sru

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle