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The unit vector veca and vecb are perpen...

The unit vector `veca` and `vecb` are perpendicular, and the unit vector `vecc` is inclined at an angle `theta` to both `veca` and `vecb`. If `vecc=alpha veca+betavecb+gamma(vecaxxvecb)`, then which one of the following is incorrect?

A

`alpha = beta`

B

`gamma^(2) =1-2alpha^(2)`

C

`gamma^(2)= -cos 2theta`

D

`beta^(2) = (1+cos 2theta)/2`

Text Solution

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The correct Answer is:
A, B, C, D
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