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How do you go about solving this question as it says:

Show that the matrix:

| costheta sintheta 0 |

B= | -sintheta costheta 0 |

| 0 0 1 |

is invertible for all values of theta [Hint. Show that det(B) is not equal of all values of theta ]

Thanks

Stephen

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# Invertiable for all values of theta

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