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vec A isa vector with direction cosines ...

` vec A` isa vector with direction cosines `cosalpha,cosbetaa n dcosgammadot` Assuming the `y-z` plane as a mirror, the directin cosines of the reflected image of ` vec A` in the plane are a. `cosalpha,cosbeta,cosgamma` b. `cosalpha,-cosbeta,cosgamma` c. `-cosalpha,cosbeta,cosgamma` d. `-cosalpha,-cosbeta,-cosgamma`

A

`cos alpha, cosbeta, cos gamma `

B

`cos alpha, -cos beta, cos gamma `

C

`-cos alpha, cos beta, cos gamma `

D

`-cos alpha, -cosbeta, -cosgamma `

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The correct Answer is:
C
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