at any point of a circle p(x,y)
the value of y =

at any point of a circle p(x,y)
the value of x =

in a circle θ is the angle which is between r and .....

the area of a circle

sin(0)

sin(π/2) =

sin(π) =

sin(3π/2) =

sin(2π) =

cos(0)

cos(π/2) =

cos(π) =

cos(3π/2) =

cos(2π) =

sin(π/6) =

cos(π/6)

sin(π/3)

cos(π/3) =

sin(π/4)

cos(π/4)

cosθ/sinθ