NDA2017MathematicsTrigonometric Ratios & IdentitiesActual
If A = 3 5 , where 450^ A 540^ , then A 2 is equal to
Options
- A1 10
- B- 3 10
- C3 10
- DNone of the above
Correct answer
D. None of the above
Step-by-step solution
aligned & Sin A = 3 5 ; 450^ A 540^ & 225^ A 2 270^ & A = -4 5 ( ~A lies in Q 2) aligned aligned & ^2 ~A 2 = 1+ A 2 = 1 10 & ~A 2 = -1 10 ( ~A 2 lies in Q3 ) aligned