If you have to find cos(150) on the unit circle would it be easier to convert it to sin (90-150)? - Quora
Question[nceRt exempLAr]6. fafafe 求a aus er a (a+i b)a fm:(a) cos 150^{circ }-i 1100^{circ }(b) 2 cos 240^{circ }+i sin 240^{circ }(c) cos pi +i sin pi == nfon zian aì aaha
![Solve this: The value of cos 150 is (C) 12 (B) (D) none of these alue of cos 2a may - Maths - Introduction to Trigonometry - 11643567 | Meritnation.com Solve this: The value of cos 150 is (C) 12 (B) (D) none of these alue of cos 2a may - Maths - Introduction to Trigonometry - 11643567 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/discuss_editlive/1078112/2012_01_21_10_07_28/mathmlequation5232362819807035429.png)