NDA2022MathematicsTrigonometric Ratios & IdentitiesActual
What is ^2 ( 4 + )- ^2 ( 4 - ) equal to?
Options
- A2
- B2
- C2
- D2
Correct answer
A. 2
Step-by-step solution
aligned & ^2 ( 4 + )- ^2 ( 4 - ) & = [ 4 + + 4 - ] [ 4 + - 4 + ] aligned [ ^2 x- ^2 y= (x+y) (x-y) ]= 2 2 = 2