Trigonometric EquationHard
Question
The trigonometric equation sin-1 x = 2 sin-1 a, has a solution for
Options
A.
B.all real values of a
C.|a| < 
D.|a| ≥
Solution
-
≤ sin-1 (a) ≤ 
≤ |a| ≤ 
Hence, (D) is the correct answer
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