BITSAT2021MathematicsTrigonometric EquationsActual
If y= 2 1+ + , then value of 1- + 1+ is
Options
- Ay 3
- By
- C2 y
- D3 2 y
Correct answer
B. y
Step-by-step solution
1- + 1+ = 1- + 1+ 1+ + 1+ + = (1+ )²- ² (1+ )(1+ + ) = (1+ ² +2 )- (1- ² ) (1+ )(1+ + ) = 2 1+ + =y