Question

-15 points . STrig2 4.T.008. Find all solutions in the interval [0, 2T), rounded to five decimal places. (Enter your answers as a comma-separated list.) 8 cos 20 4 0/5 points STrig2 4.T.009. Previous Answers Find the exact value of cosl 2 tan1 15 cos(2.162) x

Answer 1

Solution-

solution-

8. Cos 20=4 [0,27) {duride by 8 }, → Sos 20 » Cos 20 : & » 20:5 on 20:55 D = 0.5235987.00 26179938 10=0.52360 2.617991

8 1 gr old so cos (2 tan! 1) -0 ut, 2 tan is = x tai 18 is = tan & 2 to 4 S - 2 Now, eq 0 becomes Эts x Intan 2 3 It tous ? 1- (15/5)2 , 1-2/64 mos e T+ (15/6): 1+ 225/64 (64-225)/65 2161 cos x = 164+225) / 64. 28 cos (2 tam 15):-16169 By using eq 0}