A) \[10\,cm\]
B) \[10\sqrt{2}\,\,cm\]
C) \[\frac{10}{\sqrt{2}}\,\,cm\]
D) None of these
Correct Answer: B
Solution :
From the diagram \[\cos {{45}^{o}}=\frac{b}{BC}=\frac{10}{BC}\] \[\Rightarrow \] \[\frac{10}{BC}=\frac{1}{\sqrt{2}}\] \[\Rightarrow \] \[BC=10\sqrt{2}\,cm\]You need to login to perform this action.
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