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find the range of values of t for which ...

find the range of values of t for which `2sint=(1-2x+5x^2)/(3x^2-2x-1)`

A

`[-(pi)/(2),(pi)/(2)]`

B

`[(3pi)/(10),(pi)/(2)]`

C

`[-(pi)/(2),(pi)/(10)] cup[(3pi)/(10),(pi)/(2)]`

D

All of these

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The correct Answer is:
A, B, C, D
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