Determinants

Bihar Board Class 12 · Mathematics · 70 past questions

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1. Q54 2019 Set F

   $\begin{vmatrix}\sin20^\circ & -\cos20^\circ\\ \sin70^\circ & \cos70^\circ\end{vmatrix}=?$

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2. Q55 2019 Set F

   Evaluate $\begin{vmatrix} 1 & -1 \\ y & x \end{vmatrix}$

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3. Q56 2019 Set F

   Prove that $\begin{vmatrix} \cos 15^\circ & \sin 15^\circ \\ \sin 75^\circ & \cos 75^\circ \end{vmatrix} = 0$

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