Đáp án: Simplifying
cos2x + -2sinx + -1 = 0
Reorder the terms:
-1 + cos2x + -2insx = 0
Solving
-1 + cos2x + -2insx = 0
Solving for variable 'c'.
Move all terms containing c to the left, all other terms to the right.
Add '1' to each side of the equation.
-1 + cos2x + 1 + -2insx = 0 + 1
Reorder the terms:
-1 + 1 + cos2x + -2insx = 0 + 1
Combine like terms: -1 + 1 = 0
0 + cos2x + -2insx = 0 + 1
cos2x + -2insx = 0 + 1
Combine like terms: 0 + 1 = 1
cos2x + -2insx = 1
Add '2insx' to each side of the equation.
cos2x + -2insx + 2insx = 1 + 2insx
Combine like terms: -2insx + 2insx = 0
cos2x + 0 = 1 + 2insx
cos2x = 1 + 2insx
Divide each side by 'os2x'.
c = o-1s-2x-1 + 2ino-1s-1
Simplifying
c = o-1s-2x-1 + 2ino-1s-1
Reorder the terms:
c = 2ino-1s-1 + o-1s-2x-1
Giải thích các bước giải:
