NDA2022MathematicsTrigonometric Ratios & IdentitiesActual
What is 36^ - 72^ equal to?
Options
- A5 2
- B- 5 2
- C1 2
- D- 1 2
Correct answer
C. 1 2
Step-by-step solution
aligned & 36^ - 72^ =-2 54^ (-18^ ) & =2 54^ 18^ =2 ( 5 +1 4 ) ( 5 -1 4 )= 1 2 aligned