WBJEE 2015 Math Solved Paper

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Question : 59 of 80

Marks: +1, -0

The trigonometric equation sin–1x = 2sin–12a has a real solution if

|a| >
1
√2
1
2√2
< |a| <
1
√2
|a| >
1
2√2
|a| ≤
1
2√2

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