Sigma n=1 to infinity of cos n*pi/2

Find the equation of a line that is perpendicular to line g that contains (p, q). coordinate plane with line g that passes through the points negative 3 comma 6 and 0 comma 5 3x − y = 3p − q 3x + y = q − 3p x − y = p − q x + y = q − p

Write down in words the number 65 405

Iwas absent when my class learned this and my teacher is to lazy to teach it to me explain this to me .