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Unit vectors veca and vecb ar perpendicu...

Unit vectors `veca and vecb` ar perpendicular , and unit vector `vecc` is inclined at an angle `theta` to both `veca and vecb . If alpha veca + beta vecb + gamma (veca xx vecb)` then.

A

`x=costheta, y=sin theta, z=cos2theta`

B

`x=sin theta, y=cos theta, z=cos2theta`

C

`x=y=costheta, z^(2)=cos2theta`

D

`x=y=costheta, z^(2)=-cos2theta`

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AAKASH INSTITUTE ENGLISH-VECTOR ALGEBRA-ASSIGNMENT (SECTION-B)
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