NDA2024MathematicsTrigonometric Ratios & IdentitiesActual
ABC is a triangle such that angle C =60^ , then what is A + B ( A - B 2 ) equal to?
Options
- A2
- B2
- C1
- D1 2
Correct answer
C. 1
Step-by-step solution
aligned A + B ( A - B 2 ) & = 2 ~A + B 2 ~A - B 2 ( ~A - B 2 ) & =2 ( - C 2 ) & =2 ( 2 - C 2 )=2 C 2 & =2 30^ =2 1 2 =1 . aligned