NDA2023MathematicsTrigonometric Ratios & IdentitiesActual
Let p= ( 5 ) ( 2 5 ) and q= ( 4 5 ) ( 8 5 ) . What is the value of p q ?
Options
- A- 1 16
- B- 1 4
- C1 4
- D1 16
Correct answer
A. - 1 16
Step-by-step solution
Since, pq aligned & =- ^2 ( 5 ) ^2 ( 2 5 ) & =- ( 5 +1 4 )^2 ( 5 -1 4 )^2 & =- (5-1)^2 16 16 =- 1 16 aligned