Answer:
juhl;lnjk j bmnkj mkl
Step-by-step explanation:
refer to the attachment hope it helps you
sorry for my worst handwriting
Answer:
bbc
Step-by-step explanation:
2cos^2x+cosx-1 = 0
2cos^2x + 2cosx - cosx - 1 = 0
(2cos^2x + 2cosx) - (cosx + 1) = 0
2cosx(cosx + 1) - 1(cosx + 1) = 0
(cosx + 1)(2cosx - 1) = 0
cosx+1 = 0 or 2cosx-1 = 0
cosx+1 = 0 gives cosx = -1, x = PI
2cosx-1 = 0 gives cosx = 1/2, x = PI/3 or x = 5PI/3
answer: x = PI/3 or x = PI or x = 5PI/3
Hablas español pero la verdad nose