How is the cos A and Sin A equal to coordinates on the unit circle i have seen them becoming coordinates in first quadrant but i want to know how are they equal to coordinates in 2nd quadrant too??

SBI Fund ledger group

class 9 NCERT question 

ch 9 therom 9.1

ABC =BC =OA=7cm measure and write the size of c 

The paint in a certain container is sufficient to paint an area equal to 9.375m. how much bricks of dimension 22.5cm into 10cm into 75cm can be painted out of this container?

1. x×4 1÷x×4=194 so find values of x×3 1÷x×3