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Unit vectors vec aa n d vec b are perpe...

Unit vectors ` vec aa n d vec b` are perpendicular, and unit vector ` vec c` is inclined at angle `theta` to both ` vec aa n d vec bdot` If ` vec c=alpha vec a+beta vec b+gamma( vec axx vec b),` then (a)`alpha=beta` (b) `gamma^2=1-2alpha^2` (c) `gamma^2=-cos2theta` (d) `beta^2=(1+cos2theta)/2`

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