NDA2010MathematicsTrigonometric Ratios & IdentitiesActual
What is the value of 15^ 75^ ?
Options
- A1 / 4
- B1 / 8
- C1 / 16
- D1
Correct answer
A. 1 / 4
Step-by-step solution
aligned & (45^ -30^ ) (45^ +30^ ) & = ^2 45^ - ^2 30^ & = ( 1 2 )^2- ( 1 2 )^2= 1 2 - 1 4 = 1 4 aligned