Question

Solve the equation for x If 0 sx < 21. Give your answer in radians using exa cos x + cos2x = 0 7C 3 X Need Help? Read It Talk to a Tutor 7. [1/1 Points] DETAILS PREVIOUS ANSWERS MCKTRIG8 6.2.02: Solve the equation for x if 0 sx < 22. Give your answer in radians using exact 2 sin2 x - 3cOS X - 3 = 0 21 411 . 33 Need Help? Read It Talk to a Tutor 8. [0/1 Points) DETAILS PREVIOUS ANSWERS MCKTRIG8 6.2.025. Solve the equation for x if os x < 26. Give your answer in radians using exact 2 sin x - cotx - CSC X = 0 70 3 X Need Help? Read It Talk to a Tutor

Answer 1

Cosu & Casan=0 [OnLRT 477 nz2, 4 1 77 within the range of On 227]. or, casn + (2 casa - 1)=0 2 cos^n + casu- 1 = 87 2 sinna cotu. Cosce nto (osna L2T 2 corn + 2 conn- cosn - 120 0 o a casa (cosx + 1) - 1 (casn +1)=0 a. (casn +1) (acosn-1)=0 2 sinn- Corn sinn sinn 2 sinn-cosn - 1 -0 sinn Juen either cosntl=0 or, 2 cosu 080-1-0 cosn a - 1 corno (2 sinn-1 casu) a (2 in 1) 2 (1-Conra) - 1 - cosx = 0 n = can (-1) O, on « 2coin = 1 a corn na cast (1) or 71 ST 2 - 2 corn - 1 - casn=0 / 3 77 7T 3 ST 3 (unition the range OERL 277 Ja 2 con - cosa tl=0 الت ar nt cosu Belgicaru 7} 2 sinn - 3 cosa - 3-0 [O?«420] -o a 2 (1-conn) - 3 coin - 320 2 cant casn-1 2 - 2 corn - 3 corn - 3=0 on, acown of 2 casa - cosa-1-o - 2 cas~ x 3 cos n - 1 =0 on (-1) (2 casut 3 cosntico a, a cas n (cosnt 1)-1 (casn+1)=0 (cosnt 1) (2005n-1)=0 on, 2 corn + 3 count 1-0 a 2 con x + 2 casa + cosntl=0 or 2 cos n-1=0 놀 Juan either, casnflro a, con casa=(-1) x= cos(-1) 77 cos n an na cost 2 corn (casa n+1) + 1 (casx+1)=0 (corntl (alos at 1) =0 Then either, casn+1=0 2loontl=0 (+) 2 I 3 casa =(-1) con z 1 놀 .. n = 77, wly 57 3 (within the range of O2 2 2 27 ) na cos!(-) = cos(-1) n = 277 25