Question

Please help 1. Find the rectangular coordinates of (7, 150°).

Answer 1

Explanation:

`x=r cos \theta=7 cos150=7cos(180-30)=-7cos ~30=-(7√(3) )/(2) \\y=r~sin~\theta=7~sin ~150=7~sin~(180-30)=7~sin~30=(7)/(2) \\so ~coordinates ~are~(-(7√(3))/(2) ,(7)/(2) )\\C`