9000046507

SubArea: 
Trigonometric equations and inequalities
Level: 
C
Project ID: 
9000046507
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. \[ \sqrt{3}\cos x = 1 -\sin x \]
\(3\cos ^{2}x = (1 -\sin x)^{2}\)
\(3\cos ^{2}x = 1 -\sin ^{2}x\)
substitution \( 1 -\sin x = z\)
substitution \( \cos x = z\)