NDA2014MathematicsTrigonometric Ratios & IdentitiesActual
What is ^2(3 )+ ^2(4 )+ ^2(5 ) equal to?
Options
- A0
- B1
- C2
- D3
Correct answer
B. 1
Step-by-step solution
aligned & ^2(3 )+ ^2(4 )+ ^2(5 ) & =(0)^2+(1)^2+ ^2(5 ) ^2(5 ) & =0+1+0=1 [ array l n =0 n =(-1)^n array ] aligned