NDA2014MathematicsTrigonometric Ratios & IdentitiesActual
If A + B + C = , then what is ( A + B )+ C equal to?
Options
- A0
- B2 C
- CC- C
- D2 C
Correct answer
A. 0
Step-by-step solution
aligned A + B + C & = A + B & = - C ( ~A + B ) & = ( - C ) ( A + B ) & =- C aligned Now, (A+B)+ C=- C+ C=0