9000046505

SubArea: 
Trigonometric equations and inequalities
Level: 
C
Project ID: 
9000046505
Accepted: 
1
Clonable: 
0
Easy: 
0
Identify the optimal first step convenient to solve the following trigonometric equation. Do not consider the step which is possible but does not help to solve the equation. sin⁡x=1+cos⁡x
sin2⁡x=1+2cos⁡x+cos2⁡x
sin2⁡x=1+cos2⁡x
substitution 1+cos⁡x=z
sin⁡x−cos⁡x=z