NDA2020MathematicsTrigonometric Ratios & IdentitiesActual
Paragraph: Read the following information and answer that follow: Let a ^2 x+b ^2 x=c ; b ^2 y+a ^2 y=d and p x=q y . Question: What is d-a b-d equal to?
Options
- A^2 y
- B^2 y
- C^2 y
- D^2 y
Correct answer
C. ^2 y
Step-by-step solution
From b ^2 y+a ^2 y=d aligned & b ^2 y+a ^2 y=d ( ^2 y+ ^2 y ) & (b-d) ^2 y=(d-a) ^2 y & ^2 y ^2 y = (d-a) (b-d) ^2 y= (d-a) (b-d) aligned