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Matrix=[[e^t,e^-t(sint-2cost),e^-t(-2sin...

Matrix`=[[e^t,e^-t(sint-2cost),e^-t(-2sint-cost)],[e^t,-e^-t(2sint+cost),e^-t(sint-2cost)],[e^t,e^tcost,e^-tsint]]` is invertible. (a) only if `t=(pi)/(2)` (b) only `t=pi` (c) `tepsilonR` (d) `t!inR`

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JEE MAINS PREVIOUS YEAR ENGLISH-JEE MAINS-All Questions
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