Level:
Project ID:
2010010703
Source Problem:
Accepted:
0
Clonable:
1
Easy:
0
Identify the equation which arises from the following equation using an optimal
substitution.
\[
2\sin ^{2}x -5\cos x +1 = 0
\]
\(2t^{2} + 5t - 3= 0\)
\(2t^{2} - 5t +1= 0\)
\(2t^{2} + 5t - 4= 0\)
\(2t^{2} - 5t +2= 0\)