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A = [{:(e^(t), e^(-t)"cos"t, e^(-t)"s...

`A = [{:(e^(t), e^(-t)"cos"t, e^(-t)"sin"t),(e^(t),-e^(-t)"cos"t-e^(-t)"sin"t, -e^(-t)"sin"t + e^(-t)"cos"t),(e^(t), 2e^(-t)"sin"t, -2e^(-t)"cos"t):}]"then A is"`

A

Invertible only if t = `pi`

B

Invertible for all `tinR`

C

Invertible only if `t=(pi)/(2)`

D

Not invertible for any `tinR`

Text Solution

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The correct Answer is:
B
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