NDA2022MathematicsTrigonometric Ratios & IdentitiesActual
If (1+ )(1+ 9 )=2 , then what is the value of (10 ) ?
Options
- A0
- B1
- C2
- DInfinite
Correct answer
B. 1
Step-by-step solution
aligned & (1+ )(1+ 9 )=2 & 1+ 9 + + 9 =2 & + 9 =1- 9 & + 9 1- 9 =1 & ( +9 )=1 & 10 =1 aligned