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Evaluate: (i) |(5 ,4),(-2, 3)| (ii) |(s...

Evaluate: (i) `|(5 ,4),(-2, 3)|` (ii) `|(sintheta,costheta),(-costheta,sintheta)|` (iii) `|(x-1, 1),(1,x^2+x+1)|`

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Solution:
(i)`|(5 ,4),(-2, 3)|`
`=5 xx 3-4 xx -2`
=`15+8`
=`23`
(ii) `|(sintheta,costheta),(-costheta,sintheta)|`
=`(Sintheta xx Sintheta)-(costheta xx -costheta)`
=`Sintheta^2+costheta^2`
...
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