A) \[-1\]
B) \[0\]
C) \[1\]
D) \[2\]
Correct Answer: B
Solution :
[b] \[\left| \begin{matrix} {{\sin }^{2}}13{}^\circ & {{\cos }^{2}}13{}^\circ & -1 \\ {{\cos }^{2}}13{}^\circ & -1 & {{\sin }^{2}}13{}^\circ \\ -1 & {{\sin }^{2}}13{}^\circ & {{\cos }^{2}}13{}^\circ \\ \end{matrix} \right|\] \[=\left| \begin{matrix} 0 & {{\cos }^{2}}13{}^\circ & -1 \\ 0 & -1 & {{\sin }^{2}}13{}^\circ \\ 0 & {{\sin }^{2}}13{}^\circ & {{\cos }^{2}}13{}^\circ \\ \end{matrix} \right|=0\] Applying \[{{C}_{1}}\to {{C}_{1}}+{{C}_{2}}+{{C}_{3}}\]You need to login to perform this action.
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