Why is
sin(theta)= -1
equal to
theta=(3\pi)/2

the answer is simply just 6n add the two together as they have an n

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540