Câu hỏi: Cho hình chóp
A.
B.
C.
D.
Ta có:
$\Rightarrow \left\{ \begin{matrix}
\left( SBC \right)\cap \left( ABC \right)=BC \\
AB\bot BC,AB\subset \left( ABC \right) \\
SB\bot BC,SB\subset \left( SBC \right) \\
\end{matrix} \right.$$\Rightarrow \widehat{\left( \left( SBC \right),\left( ABC \right) \right)}=\widehat{SBA}$.
A.
B.
C.
D.
Ta có:
$\Rightarrow \left\{ \begin{matrix}
\left( SBC \right)\cap \left( ABC \right)=BC \\
AB\bot BC,AB\subset \left( ABC \right) \\
SB\bot BC,SB\subset \left( SBC \right) \\
\end{matrix} \right.$$\Rightarrow \widehat{\left( \left( SBC \right),\left( ABC \right) \right)}=\widehat{SBA}$.
Đáp án D.