Question

How to find the reference angle of -11pi/3 ?

Answer 1

Just replace π by 180°


`\boxed{-(11\pi)/(3)=-(11*180)/(3)=-660^o=60^o}`

Answer 2

`- (11 \pi )/(3) \\ \\ =- (11*180)/(3) \\ \\ =- (1980)/(3)`


`=-660` °

= 60 °