If f(x)=\begin{bmatrix} cosx & -sinx & 0 \\ sinx & cosx & 0 \\ 0 & | Filo
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Class 12

Math

Algebra

Determinants

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If and , then is equal to

Correct Answer: Option(b)
Solution: Consider,       ....(1)

 






 
  
or, 

     .....(2)








 

     

   ....(3)

Substitute the values from (2) and (3) in (1), we get



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